I don't blacklist any coin but ignore any coin that is over hype especially all this memecoins feeling themselves on the solana chain. We have too many shitcoins so it's practically not easy to blacklist them but whatever that have to do with this shitcoins I wouldn't take part in it.
People often seem to forget crypto's use cases or hidden potential. They'll choose any coin without doing prior research as long as it makes them a quick buck in return. I wouldn't be surprised if existing altcoins die only to be replaced by new ones in the future. That's how the crypto market works, right? 
Exactly, this shitcoins from my understanding most are created by the same group of persons, who will kill a coin. after raising the hopes of investors then they will come back with another coin that they will feel like it's best again then the same actions will reoccur.