I've gotten into the habit of picking up after others between sets. Racking plates, putting dumbells back in proper order etc. Am I unique in this, or are there others out there who take ownership in their respective gyms?
Yes/no. If I happen to use a plate or dumbbell that someone left behind, then I'll put it back after using it. But other than that, no. It's really the gym staff's responsibility to tell the lazy members to rack their weights.