I dunno about dubs taking legal action against householders... how would they justify their intrusion in the first place? They go out and ASK for abuse by their arogant behavior, we've all seen or experienced it.
I don't advocate siccing Rottie and Dobie on the hapless r&f drones. I prefer the intellectual and verbal sawed-off-shotgun to actual firearms. But I sure do understand the frustration of night workers, harried housewives, and other disgruntled folks who just want the wacky cultoids to keep their religion in their pants and quit knocking on doors exposing it to all&sundry... if JWs want to be unmolested, they should try being a WHOLE lot more tactful and sensible. No means 'no' in any language!
When I was preggers with Little Dark, I was restricted to bed rest during the heat of the day. We set up a bed in the front room so I could be in the midst of things. I answered the door one day and it was a JW elder. I told him politely that I had to get off my feet and was really NOT interested. He stood there nattering at me, trying to guilt me with my unborn child's horror-fraught future in the horrible world, reading 'just one more' scripture, nattering, nattering... until finally I just shut the door in his stupid face, left him in mid-natter, and the old idiot had the nerve to try knocking again!
This sort of behavior is why JWs get shot at and screamed at and dogs sicced on them. I doubt a sane judge would believe a JW is just an innocent victim of assault. Most householders could claim temporary insanity by reason of extreme provocation...