Consider the Pooptastrophe (also known as the Poopocalypse): https://cheezburger.com/897029/dogs-roomba-please-consider-t...

Can confirm that Roomba running over dog poop is a bad way to start the day

Yes it is that bad.

Two months ago, my partner vacuumed up fox poop. No idea why he thought it was a good idea. We realised it wasn't when the soft, sticky debris coated the inside of the vacuum cleaner's flexible hose. :(

The smell only improved after I cleaned every internal crevice. Including submerging the crinkly part of the hose in a half-full bath and pulling through a sponge three or four times.

We still have to put deodorant beads inside the vacuum cleaner bag.

it's the kind of thing that only has to happen once for you to remember it forever.

Oh, I don't have either, I was just using that as the canonical example.