Not quite, unless you're talking actually modifying hitpoints via memory.
Around 1999-2000 there was a bot for Quake 2 called Ratbot. I beat a people who were using it because I had hundreds of hours of map knowledge and tactics. Raw aim didn't mean anything. You could tell they were using a bot because it had this handy feature. Whenever anyone said "ratbot" in chat, the bot would respond with "I am ratbot!"