ISTR it was as recently as the mid-90s that "xhost +" ceased to be a default, or that "cat fart.wav >> remote:/dev/audio" required privileges.
Surely playing sillybuggers around the network is a rite-of-passage for students, bored hacks, and the like.
Even today you can have a bit of fun. For example, type an RTL language (and charset) into IRC and spread confusion!
?זה יעבוד כאן
کیا یہ یہاں کام کرے گا؟
OK, no it won't work here.