If you read this, please respond, to avoid bias as much as possible.
I don't like this sort of request. You're forcing obligations on anyone who reads this thread. You can do better in this respect if you rot13 the question or make it an external link. Even with that I'm uncertain about this.
Anyways, I can't think of three vegans for whom I can usefully comment on their reasons.
Sorry, I tried to make it more decidable now.
This is a thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. The previous "stupid" questions thread is at almost 500 questions in about a month, so I think it's time for a new one.
Also, I have a new "stupid" question.