Farmville keeps harrasing me on my WP

There are a few of my friends who, for whatever reason, play farmville. I have hidden those on the faceboook feed. I have also blocked farmville on facebook.com. But for some reason, farmville posts still keep showing up on my windows phone what's new feed. It's not just farmville, though most of these "games" dissapear when i block them on facebook.

is there anything i can do about it, other than delete those contacts?