I’m actually not aware of any script that does that, its not something that any sane bitcoiner would share. I only have done it with the whitepaper.

op_returns aren’t stored in the utxo set by design. So if you have a pruned node it won’t keep it around. but you might still have it in the utxoset somewhere else if there is some not stored in op_return.

an attacker likely would store them in the utxoset just to fuck with bitcoiners, not op_return