In a colorful selfie video released today, John Legere, CEO of T-Mobile, got riled up and demanded to know who EFF is.

This came in response to questions that EFF submitted during Legere’s Twitter Q&A session about the new T-Mobile service, Binge On. Earlier this week, EFF published a report showing how the service—which T-Mobile claimed used adaptive video technology to optimize streaming for mobile devices—actually just throttled video and left the optimization to the video providers. Check out our detailed report.

Of course, there are lots of unanswered questions about Binge On, which is why EFF and our followers were happy to engage with Mr. Legere during today’s Twitter conversation.

Legere, it seems, was less happy to engage with us. He demanded to know: “Who the f*ck are you anyway EFF, why are you stirring up so much trouble, and who pays you?”

On Twitter, EFF members, friends, and technology users worldwide have stepped up to answer that question:

We think the best response comes from the community of people who support our work. As a member-funded organization, EFF exists because of the donations of tens of thousands of regular people. And as an advocacy organization fighting for civil liberties in the digital world, we are able to influence powerful entities—from heads of state to elected officials to tech giants—because so many people stand with us.

Consider yourself part of the EFF community? Care about the future of digital rights online? Then please send a tweet to Mr. John Legere and introduce yourself using the hashtag #WeAreEFF. Want to support our work? Join here.