Google and Facebook Reinstate Cryptocurrency Ads. Why Can't They Protect Me From the Airdrop Trash?

Google and Facebook recently re-instated advertising for Coinbase on their platforms. This is a good thing for the public perception of cryptocurrencies because they get such negative press from a few big-wigs. People tend to remember bad things better than good things so hopefully the advertising reinforcement will help more people to do the right thing and buy the right cryptos.

Since Google and Facebook really want to take care of me and help me, what are they going to do about all the trashy promotional tokens that I get at my Ethereum address. I might invest in them and lose all my money. And then what?