Re elder stalking I think WT's official policy would be carefuly worded to say it never happens but I've seen evidence of it too many times in too many congregations to know that it happens alright.
Even if there is no evidence of it in your experience "absense of evidence is not evidence of absence"!
I'm personally aware of elder stalking that was carried out on various individuals (and families) one was a guy that hadn't been baptized that long and was fading and attending a church in the area, in a smalltown with jdubs lurking around every other corner you can bet one of them will see you and the congregation will gossip about it. Everyone in the cong knew of both the fader's activities and the elder "sting" operation it was a big deal in the area, in fact two other brothers and a sister ended up followed the guy out!
Another situation, another state, involved an XCO who slept with a prostitute so he could get a scriptural divorce, get reproved and remarry. The local body of his elder buddies helped him navigate the whole process and discredit his wife who believed (quite rightly) they were all in on it. Bethel sent out "undercover" brothers because the elders told the branch the CO's wife was in an "apostate ring" and they monitored and observed the sisters in that cong for months. It wasn't until a younger sister came forward and claimed the XCO and herself were having an affair did they turn their attention to the XCO. The most they did was disfellowship him and he was reinstated in six months so he got what he wanted afterall. The XCO's wife who is my friend and a nice person to boot was devasted by it all and is now a "marked woman" so to speak. Sounds far-fetched but I have first hand knowlege of these events they are "on the record."
Oh it happens tho WT would deny it officially or in a court of law.