How do I block someone in an ESPN league from spamming me with one sided trade offers?

I was in a yahoo pro league a couple years ago where some other manager randomly decided to do this to me. Fill my inbox with horrible one-sided trade offers, I'd reject them, he'd send more.

After a couple of weeks, he'd start taunting me on messageboards. My team and my players are so shitty and he was trying to help by sending me his backup TE for my RB1. Trade after trade after trade. I tried contacting yahoo customer support to block him from sending me trade requests, but they said there was nothing they could do.

I got his email address off the managers paged, tracked him down with a bit of googling, found a picture of him which I then MSpainted little blue teardrops, and made it my team pic. That REALLY pissed him off.

/r/fantasyfootball Thread