Always get anxiety at a crowded dump station no matter what...either thinking I'm taking too long or something is going to go wrong and basically just not wanting to slow down other folks. Current storage has a couple of dump stations which is really nice since I can bypass campground or other dump if it's crowded.
On our recent 2-week trip (still overdue on that trip report) I saw a guy at the campground dump station with no hose just letting his tank dump "down the hole"...I let the teenage employee cleaning up another site know that he might want to stop them before he had a much worse mess to clean up. Luckily we had full hookups at that site so I didn't have to follow him through there.