It is a bad idea,scammers will steal your ETH

Yup. I sent two ETH transactions to it. Both disappeared before I could even check the balance. I'm disappointed but I should have expected this.
The people will make bots and will steal ETH,This is a very bad idea

I don't really understand the full scope of what someone can do with smart contracts, but it would seem to me you could send some ETH with a smart contract that only allowed it to be used for gas when MNE was being sent to a certain address.