Roleplayer 100%, so watch out what you are saying 
no idea what you mean here. Some kinda of benign threat?
Anyway, DEATHCLAW COSTUMES are NOT in FOnline, and they won't. Also the other stuff the at he said, i mean WTF?!
Just because it wasn't included in the final releases (namely fo1-2) doesn't mean it isn't fallout. (I know you said FOnline but that derives directly from Fo1-2 canon) There were tons of things Interplay didn't realease big and small in Fo2. Deathclaw costume could've been one of them.
There you go, back to topic
there you go what? Besides we are totally on topic... it could be another way onto the train. Dressing up a deathclaw and scaring everyone away is another form of sneaking because no one knows your identity.