[quote=@vancexentan]
I really hate when people show up too the interest check, confirm their interest before the GM starts the rp, and then promptly just not enter the roleplay or even bother to further explain why they had decided not to join if asked. 
[/quote]

How often does this happen, out of curiosity?

I can see reasons why someone would do that (including just plain forgetting), but I would like to know how often that occurs in case I ever run my own RP.