Aside from that, letting your yard grow rampant is bad for plenty of other reasons.

Anyone suggesting people shouldn't mow just because of rabbits must live in a concrete hell and have never actually had a yard.

If you don't keep the yard under control you'll have so many more problems. Bugs will be out of control, including ticks, meaning you can't let your kids play outside.

Rodents will run wild, and you eventually end up with mice and rats all over your house.

Guess what comes along with rodents (and bunnies for that matter). Snakes.

Not mowing a lawn is a huge safety and health hazard.

Which is exactly why mowing is required in most places.