Actually, I had my first escaper the other day, and after seeing that half of their games were unfinished, I send a message explaining that they needed to hit the 'resign' button when they quit or risk getting a reputation as an escaper. Surprisingly, when I signed in this evening, my unfinished game with them was listed as won by resignation, and checking their user profile showed that all their other unfinished games had been resolved as well.

So, there are some people who apparently just don't realize they're messing up.