I'm a meany. To many complaints though and I let them have 5 minutes. They're happy for the most part but I still get a few complainers. haha
I started with 5 minutes and got several complaints, so I told them I was being generous and doubling the time limit. Not too many complaints anymore. I did do some editing to allow first posts to be edited forever cuz that is needed on my site. And users are never ever allowed to do anything other than a soft delete.