I had a really unpleasant experience years ago when I had a motorhome with a macerator pump. Unbeknownst to me, some guests has tossed baby wipes in the toilet and they jammed up the pump when I tried to empty the black tank. I had to remove the pump and clean it out a total of four times before I could get the tank emptied. Yes, that's as messy as it sounds.
Unfortunately, I was dumping at home and couldn't get close enough to the sewer clean out to use the stinky slinky instead of the macerator pump.
I make a point of telling guests now what can and cannot go in the toilet.