If one was rumored to be having an affair, elders or certain ones in the congregation took to peeping in windows to try and catch them
LOL.....that sounds a little far-fetch.
I can't even picture a group of elders peeping in someone's window to try to catch them doing wrong.
Not far fetch at all. In the earlier 90's I personally knew a guy who his parents, him, and his sister were JWs. He and his sister married two JWs. Then after about 10 years he did start seeing some women he worked with. He left his JW wife. His parents, his sister, her husband (his brother in-law) didn't have any contact with him after that. But then came the time when his ex-wife (still a JW) wanted to remarry but was told that she was not Scripturally free because her ex did not remarry and there was no proof/witnesses to him and the woman he worked with.
That being the case, his brother in-law who was an elder along with another elder went and hid in the bushes at his bedroom window to peek and get said proof that he was with the said woman. Then the dip-shit elder brother in-law said to him through the window, 'we got our proof', ______ your ex is free to remarry!