I've seen Boe's do things this stupid and worse The elders and others often encourage vigilante behavior privately but the WTS won't back them up with Legal if they get in trouble. A few Boe's have found this out the hard way.
I'd have her go to the police first and get a paper trail started .She might want to write or maybe call the WTS and let them know what is happening and what she has had to do. If they knew of this behavior and esp if she makes it official with the police, well, they might tell them to leave her alone.
Is she unmarried ? Even more reason for her to fear their creepy behavior. Too many of us have let them get away with bad behavior but it can be stopped.
I just read your post above and she can always fall back on she was stumbled, depressed, and just asking for clarification. I like the idea about she just wants to attend another most supportive congregation. Done all the time here in states.