Some anon-IP user on [[Talk:OmniCode]] has been rattling sabers about threatening to sue people for failing to acknowledge a company named Omnicode, which apparently has a registered trademark on that name which is being allegedly infringed by the geek-coding system called OmniCode which is featured in the Wikipedia article of that name.
It's certainly possible that the creator of that coding system is committing a trademark violation by using the name, but would Wikipedia or its editors have any liability for writing an article about it? It would seem that a noncommercial, encyclopedic use of the name in the course of discussing something that the name has been used for (legally or illegally) wouldn't itself be actionable, but I'm not a lawyer.