In the wild world of college radio, a public service announcement (or PSA) or two had to be read at every station id break (every 20 or 30 minutes, I don't remember.) Usually the PSA was for some campus event or local concern. Because it was college, there were a lot of PSAs about stress (avoid it) and suicide (don't do it) and VD (don't get it).
For the most part, the public service announcements were completely innocuous.