>Did you know that we feed prisoners food? Surely that's rewarding the behaviour of being in prison and thus more people will prefer being in prison rather than out of it because they get fed.

So, I think you said this in sarcasm but there are people that actually try to get into prison.

Here are some articles:

https://www.businessinsider.com/jail-getting-arrested-delibe...

https://www.bbc.com/news/stories-47033704

https://www.bbc.com/news/uk-42057173

https://www.thespec.com/news-story/4425874-choosing-prison-w...

Also, IIRC, on TED Radio Hour in the past month or so one of the speakers was in prison and said something along these lines (I may be mistaken but I'm pretty confident he did).