When I first moved over here my missus and I rented a granny annex from an older couple (say around 60ish) for a few months while we sorted ourselves out.
WiFi was included and on an evening sitting at the computer, bored, I idly started exploring the network to find that there were a number of shared folders.
Now I know I shouldn't have looked and I'm not proud of it but I had a little nosey around.
Found some more than slightly dodgy photos of the old boy (and some random women, not together though) and some half filled in swingers holiday application forms.
Laughed my ass off at the time but never said a word to anyone, didn't tell my missus.