Since Grand Valley is in the middle of the small town of Allendale, it really is like its own city. Word spreads quickly, so be careful who you tell certain things to. Drinking and drug use are common mostly on the weekends for the "party" crowd. Noise complaints are the most reported in on- and off-campus housing. Most police units will just break up the loud party and send everyone home. Police are not likely to bust you for anything—unless you have been drinking underage at a party or reek of illegal substances.
The police at Grand Valley State are parking-ticket magicians. They really have nothing else better to do than sit and wait for meters to expire or drive around in parking lots to find people without permits. Tickets are generally low in cost, but they are annoying once you accumulate enough of them.