he thought Poppyseed121138 was a child but he still cussed at him so if Poppyseed121138 was actually a child ( I don't know if he is or not ) then he would of cussed to someone under the age of 13
what he said was "if womp womp makes someone evil, I think you need to log off for a while until you turn 13" which means moss-shadow believes that poppyseed121138 is a child he didn't say if saying "womp womp" is evil, then poppy might be under 13.