if you just joined fake bounty campaigns then the best option you can do is leave and find another better bounty campaigns and if you already get coins from fake ICOs then you could send it back to the owner,
for example you are using ERC20 altcoins then you could login on MyEtherWallet and send that coins into any other altcoins so that it will vanish in your wallet.
I've been joining scam ICOs and bounty campaigns and I already sent those shit coins away and good coins only stayed in my wallet.