Sometimes i come back in a thread and i don't see one of my posts; i don't know why (i don't remember every time its content), when and who deleted it. So i thought that it would be nice to receive a PM when one of your posts is deleted. Obviously it would be something automatic, because writing everytime a PM is annoying.
This could be activated/deactivated, depends if someone cares about this info, or if someone simply doesnt want to receive so many PMs. Also i thought about an option that allows you to regulate when to receive those PMs. For example you want to receive a PM every week to know if some of your posts have been deleted.