As far as I know, there is one Austrian professor at the school as of now: Mark Thornton. Roger Garrison also taught there, but he retired a semester or two ago. The presence isn't as strong within the university as around it.

Roderick Long is also a market anarchist (I think he would think Ron Paul is best-case scenario for the US) who teaches philosophy at the school, and he's involved with Mises as well as a few other organizations. So Auburn is probably better than most universities in the US for that kind of thing, but the economics department isn't a stronghold of Austrian economics or anything like that.
I don't really have any evidence in the form of pictures, but as recently as last semester, there was a big pro-life display set up outside on the campus, and this display proceeded without incident as far as I know. And there are things such as sorority banners and American flags out around campus that are technically breaking the Housing Department rules, but these rules are
never enforced. Therefore, I would think it constitutes a pretty clear double standard. If you are going to ban the displaying of banners from residence hall windows, everything must go, not just "political messages".