The only sensible choice would be to mark items as deleted for a while, say a week or two and then delete them for real. The site may even notify the user befor

The only sensible choice would be to mark items as deleted for a while, say a week or two and then delete them for real. The site may even notify the user before the permanent deletion, so he/she can think twice about what to get rid of or not. Also, this is not about whether someone steals your content but about it being your content. You should be able to do whatever you want to your content and that includes deletion.