I’ve never got the mindset of a ■■■■ grass.
Got no mates, nobody likes him, even the guy who he is sucking up to and thinks he is impressing secretly thinks he’s an arse hole, so why do they do it?? 
You can have fun with these guys by either telling them a load of crap, or feeding him stuff you WANT to get back to the boss…, and if you drop him in it by doing that, it’s a bonus. 
I’d personally like to see some of them burn to death…but that’s the type of guy I am. 