Yes, it is indeed a crime, because it can trap bounty hunters who are still beginners who are tempted by fake tokens that enter their wallets, they will be forced to spend money to get fake tokens and the result is only worthless tokens, the only one the only way is to ignore those fake tokens.
Fake tokens are just a nuisance and foul up everyone's wallets, so it's true as you say to ignore them without caring about them, because no one wants to give away expensive tokens for free without doing anything as they tell them to, so it's purely a trap intentionally made.