Yeah I fully agree there have been so many scam, ponzi or semi scam ICO advertisements or straigt up bitcoin ponzis (Bitconnect, USI-Tech, ...) going around confussing crypto beginners and given the whole scene a bad name. And yes of course most of those scams were advertised through facebook, so even though this temporary ban hurts a few legit companies and coins maybe it is not the worst that could happen to the crypto scene as a whole.