Any button on any website or Facebook site that is easily pushed while scrolling and causes you to leave your current site with no way to return.
Anti-Advertrap: Boycott the product that is being advertised in the Advertrap that trapped you.
Frigging advertrap!
I 've got to close this crap and reopen the site to get back to what I was reading. I'll remember to never buy that product who's advertrap pissed me off.