I do not normally rant, but tip4commit and its ilk are some of the most infuriating people in the world to deal with, since they're opting other people's projects into something that has all sorts of legal/taxation consequences and think that "we have no way to remove you once you get opted in" is an acceptable answer. I'd push complaints further up to GitHub, since I'm sure something in the way this works violates t…
How can there be taxation consequences unless you act to set up a bitcoin address and accept the offered tip? If you've done all that, I think it's clear you know what you're doing. If you don't do that, then the money (apparently?) returns to the project you committed to, from whence it came. The only way there could be tax is if you receive the money, and that can only happen by you deliberately becoming involved.
Tax? Perhaps not, but the OP was talking about tax and other legal consequences. These can vary wildly from country to country.
My local legislation requires applying for a permit before asking for donations. If a 3rd party would add my projects to this website, I could face criminal charges and the proof of burden would be on me.