The truth is that people will use threads. Why? First of all they are the best solution to certain classes of user interaction problems. Also a lot of people think that they are cool. And programmers who are used to languages or environments where you thread everywhere just find them familiar. Therefore it makes sense for p5p to try to support them.

What I would like is for people to not get burned by using threads where it doesn't make sense to.

For one description of why it sometimes doesn't make sense to use them, see Threads vs Forking (Java vs Perl).