In a nutshell, the problem is that the Internet.org project is being organized and controlled by Facebook, from the telecom partners who have agreed to participate—including Samsung, Ericsson, Microsoft and Qualcomm—to the selected websites and services that participants would be able to access through the initiative.

In other words, what Facebook and its partners are providing to users in countries like India, Guatemala and Zambia isn’t Internet access per se, it’s a specific subset of the Internet, composed of websites that have agreed to play ball with the social network. Some say that what Facebook is actually building is a “high-tech ghetto,” and that its approach amounts to “economic racism.” The Electronic Frontier Foundation recently took the company to task for its proposal, saying:

“As we and others have noted, there’s a real risk that the few websites that Facebook and its partners select for Internet.org (including, of course, Facebook itself) could end up becoming a ghetto for poor users instead of a stepping stone to the larger Internet.”

In an attempt to counter some of these criticisms, Facebook recently opened up the Internet.org project to outside developers and third-party services, and said that it would be giving users more choice over which sites and services they could use once connected. Zuckerberg said that the websites selected as part of the initiative needed to be simple and data efficient, so that operators could offer them for free, and that “anyone who meets these guidelines will be able to participate.”

In a video message and in an op-ed for an Indian newspaper, the Facebook co-founder added that while he believes in the concept of net neutrality—which holds that Internet providers and telecom companies shouldn’t artificially restrict access to certain websites or services, or give priority to certain content—the Internet.org project serves a useful purpose for the 4 billion or so people who have no access to the Internet at all. And giving these people access to the entire Internet isn’t economically feasible, he argued:

“Net neutrality should not prevent access. We need both. Our vision is to give people more access to free services over time [but] it’s not sustainable to offer the whole internet for free. No operator could afford this.”

So is limited access to a subset of the Internet—a subset that is ultimately selected by Facebook—better than no Internet access at all? Many critics of the plan say it isn’t. In fact, there is criticism even in some of the countries where Facebook’s proposal would have a significant impact: In India, for example, some of the companies that initially agreed to participate in the Internet.org project have backed out, or have said they will do so if their competitors also agree to quit.

In a piece on LinkedIn, Indian investor Mahesh Murthy said Internet.org amounts to “exploiting the poor in under-developed parts of the world to become your customers under the guise of some apparent charitable purpose. While offering them a shoddy, stunted version of the real thing… it just seems to be a cloaked proxy for the Facebook Economically Disadvantaged User Acquisition Department.”

A number of consumer-advocacy and digital-rights groups have also written an open letter to Facebook’s CEO, arguing that the Internet.org initiative falls down on a number of levels, including the fact that it violates the spirit of net neutrality by restricting users to only the sites that are permitted inside Facebook’s “walled garden.”

For its part, the EFF says that Facebook’s attempts to throttle data-hogging applications and websites makes sense, so that carriers don’t have to absorb huge data charges, but selecting which sites and services get to participate isn’t kosher. And there are other issues with the proposal as well, the EFF says:

“We agree that some Internet access is better than none, and if that is what Internet.org actually provided—for example, through a uniformly rate-limited or data-capped free service—then it would have our full support. But it doesn’t. Instead, it continues to impose conditions and restraints that not only make it something less than a true Internet service, but also endanger people’s privacy and security.”

In effect, says the EFF, the structure of Internet.org means that Facebook has set itself up as a gatekeeper when it comes to accessing the Internet, and this means that it has “issued an open invitation for governments and special interest groups to lobby, cajole or threaten them to withhold particular content from their service.” Until the social network truly opens up the project to anyone and everyone, Internet.org will “not be living up to its promise or its name,” the foundation says.

Mark Zuckerberg may indeed be sincere about his desire to provide some form of Internet access to poor and developing countries. But the structure of Internet.org still feels like a gambit on Facebook’s part to effectively become the Internet in those countries, and that’s something many people quite rightly find disturbing.