I believe, by extension, that the symbols, “W-E-A-P-O-N”, taken together, may also make one think of a weapon, and should likewise be banned.
"Any sound, any gesture, any hand or foot or tentacle sign that one could ever make must be 100% benign, in our opinion, in any of the infinite number of languages and signing systems that this infinite Universe, or any other, may have."
This means that the only compliant student is a motionless student inside of a telepathy-blocking enclosure. Same applies to teachers too, so teaching is no longer possible, out of fear that anyone, anywhere, anywhen, may be offended or threatened or merely inconvenienced.
/* This proof is called reductio ad absurdum. */