I encountered something ... well, you know TDWTF... something like that in an international project I'm working on. The code was written by a team mate. For a second I was tempted to add // TODO: wtf? to the infringing code but restrained myself.

The project is indeed on a professional level, but for internal conversation, more colloquial language is used - but still no "bad" words as in "wtf".

Usually, I'd surely not add such a comment, but I believe there are a few factors that allow consideration still: 1. It is not visible except as a comment in the source code (of course). 2. It is internal to our team - other developers may happen see it but it is not their code. 3. Comments in source code are usually accepted to be more colloquial, since it is "kept between us developers".

Would you totally advise to never add such a comment? Or do you regard it as an edge case? Did you possibly add something similar yourself?