Also, there can be a problem with who/how decides what is code. There are myriad of programming languages already, and for trolling or legal attack purposes, one could build interpreter using arbitrary words as keywords (to make problems for arbitrary company)
Blocking names that look like code is part of a defence in depth approach, it's not a standalone silver bullet.
Laws eventually are use not as intended, but as written.
“defense[1]”, “if happy begin something end”, “if”. All of these technically are code (somewhere). Also check out some esoteric language like: https://en.m.wikipedia.org/wiki/Whitespace_(programming_lang...