Realistically, I don't know how people do it. They will come onto MVM&R and ask a question without registering. @DucatiKiller was asking me what I thought about this question about bleeding a hydraulic clutch. He also pointed out the user hadn't registered, plus they have asked two separate questions which show up as two separate accounts. This lead me to wondering:
What is the use of upvoting such questions?
When you upvote the question, the user doesn't get any benefit from it. I guess, if they ever did create an account, the questions could be merged into it ... but it still leaves me wondering if it does any good. They don't take the two minutes it would take to create the account, which means to me they really aren't going to stick around or most probably won't even come back. How do they accept an answer which they've asked a question to? It all leaves me befuddled.