Why not create a CRYBABY token? That would be a token everyone would like to get rid of if credited to them in large quantities. On Steem, transfers are permissionless in the sense that you can't do anything to prevent anyone from transferring any token into your account.  I'm actually surprised that this idea hasn't caught on. Perhaps a ransom market could emerge where people pay others in valuable tokens to prevent others from bombarding them with ASSWIPE tokens or something. :) (It should be noted, though, that depending on the name of the token, that could expose the sender to the risk of a libel charge.)