I did tonight.  There was a pretty large cricket in my room, so I tossed a towel on it like a net and stepped on it several times.  After lifting up the towel, it wasn't moving so I figured he was dead.  I picked it up in a paper towel and figured I'd drop it in the toilet to flush it.  I sort of had to use the restroom anyway, so I dropped the paper towel and then urinated without really looking.  I then went to flush the toilet and saw that it was still alive and trying to swim, and I basically had no other option but to flush at that point.
So I stepped on it and badly hurt it.  Then pissed on it.  Then flushed it down the toilet to drown.
I literally feel like a monster, and really regret not killing it quickly or taking the paper towel outside.  
