I stumble across questions every now and then that are pretty old - earlier in the year, way back in '09 and such - and have some sort of gross misuse. Like asking for clarifications, or details on an answer by posting another answer your self. (A la here: SharePoint Registration Form - How to Hide Fields)
The particular user who did that in the above post doesn't exist anymore so there's no point in me doing something, but should I post a comment when I see something like that where the user is still active in the community? Should I do that on questions no matter what, just so that people that stumble across a question like that don't repeat that elsewhere?