A study by Standford UniversityT-Mobile’s new Binge On feature may be popular with some of its users – not to mention streaming services – many view it as problematic when viewed in light of Net Neutrality considerations. And a new study by Standford University not just backs up the idea that Binge On is a violation of the Net Neutrality standards that T-Mobile has said it respects, but that it also maybe an illegal practice.

For those who don’t geek out like we do about things like Net Neutrality, Binge On is a feature of T-Mobile’s data packages that allows select video content – such as that from Netflix NFLX +3.19% – to be streamed via LTE without counting towards a user’s data cap. In other words, one could get up to date on the entirety of House of Cards without having to worry about going over their allotted bandwidth.

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“The program limits user choice, distorts competition, stifles innovation, and harms free speech on the Internet,” according to Barbara van Schewick, the law professor that authored the study.

T-Mobile, for its part, has said that it’s open to allowing other services to join its Binge On collection. That said, van Schewick points out that the requirements for a service to join into Binge On may be technically more challenging that T-Mobile makes them out to be.