I used to do Air drop and bounty. Get all coins in time when the market is down. The value of all these coins lost 90% even now looking at it I do not believe it is no longer valid.
I cannot sell them because no one buys them, and its value can only be enough to transfer to exchange.
So do you have a way to hide it or delete all the coins from your wallet?
You cannot delete or hide coin that you have in Myetherwallet, because there is no myetherwallet system to delete or hide coin that you have, but if you really want to eliminate them, so I advise you to create a new wallet and transfer it to a new wallet.
Yes, they cant do that the only option available if you dont want to see it is to transfer to another ETH wallet .which requires eth balance for transaction fees if you are willing to waste some eth to send it to another wallet that will be the best option and you will never find that token again.