Yes, that is silly. Dog's are property under the law, not people. It should have been the owner of the dog that was served.
On the other hand, if my dog causes some damage, it would be nice if it was his responsibility and not mine. His posessions consist of a blanket, a collar and a rawhide bone, where mine are slightly greater in value. I think I would rather have someone suing him than me. If he can't pay, maybe he can do community service, which in my area generally consists of washing golf carts at the municipal course. Not sure how he'd hold the hose, though...