How to detect bots on steamgift

Here

In one of the giveaways you have a guy saying thanks even though there is no entry in it.

That was my life.

EDIT: So much bots commenting trying to protect their accounts

EDIT2: To me people who say thanks just for their stupid ratio deserve the same fate as pedophiles

EDIT3: I've seen I hurt a lot of pedophiles's feelings, so let's just replace it with Jehovah's witnesses or poorly parked people.