Although we (profs) would all hope that our students would be reasonable on evaluations, there will always be exceptions. I think Anon brings up a good point in the comments on my last post: tenure committees will ONLY have the evaluations, not necessarily the whole reason(s) behind the comment.
It might sound insane that a student would complain about lack of availability just because of a missing cell number (but not actually mention the cell phone part).
But consider this: a colleague at my previous institution got reamed on her evaluations the semester she returned after maternity leave. Over and over, students commented about her office door being shut during working hours.
The reason her door was closed, at scheduled times, for 20-30 minute stretches? She was pumping. Try explaining THAT in a tenure packet.
