There’s a certain point where they become abandoned property, and you can just do with them whatever you want. My guess is that it’s some point after the existing contract runs out, plus 30/90/365 days or whatever. Possibly requiring a court order, public notice, or something else. This will depend entirely on your jurisdiction’s laws on abandoned property.
I can confirm that All on Sopuli is regularly inundated by suggestive (but usually not outright pornographic) anime pics. Most of these are the “Moe” communities, but there are a handful that specific to the franchise the characters are from.