Pine Needles on the Carpet

She rubbed her sneakers on the carpet - just to spite me.

I don't know how many times I politely asked my roommates to remove their shoes while in the house.

The floor is a sacred place. I watch TV on the floor, eat on the floor, sleep on the floor and everything else on the floor. So, when someone purposely rubs shoes onto the carpet that may or may not have tracked in dog shit or God-knows-what, it's not only an insult, it's downright malicious.
And on carpet?!  There's no way to wipe it up!  Who knows what kind of animals are living in the folds of  fabric now!