OK, I suppose it could happen. I do know one of the reasons though. That last time I was in Universal I was looking at the park map trying to get my bearings and a custodial team member stopped and asked me if he could help me find something. I told him that I had just figured it out, but thanks for asking. He then asked me where I was from and commented on that and spoke with me for about 10 minutes concerning the park and the Harry Potter changes. He was friendly, engaging and willing to interact with guests. So, I probably am responsible for the all important trash can to not get serviced. My bad.
Just as a side note, I don't remember any CM, custodial or otherwise ever actively asking if they could help. That particular week, Uni won my admiration and Disney lost a lot, but, it didn't have anything to do with trash cans.