[1]Blockhead places down a brick.
[2]Glass joins with text, "Glass" appears over the head of the player, using the creepy smile face.
[3]Faded Glass connected. in the background, the whole place is spammed with Glass, Blockhead has the ASCII Terror face.
Fair enough.
Cameo things and whatnot should be quite easy to make little jokes in.
The Glass one would work well.
You could have another where, say, Badspot is seen to join the server and stands there.
Lots of other "noobs" swarm around him and try to jump over him.
Meanwhile, the real Badspot is on the otherside of the server building without distraction.
He's tricked all the others with a bot!