The “Come Back With A Warrant” doormat is a funny quip aimed at unwanted guests knocking on your door. Of course, if you’re the sort who’s had more than one run-in with the law, then it’s literally a warning for the cops not to show up unless they have a warrant. In any case, it tells guests you’re not a doormat and they shouldn’t be walking all over you. The actual doormat, on the other hand, is made for people to walk on and ensures they don’t bring dirty boots with all kinds of mud and bacteria and nasty stuff into your home. It’s also sure to keep away the annoying neighbors and pesky kids from bothering you unless they’re invited.