hey dont want to be the bearer of bad news but you can't just post images you captured. things you post have to be your own artwork. i wont report you if you delete them.
sure you can. but you need more than just "i captured this" in your description. that's basically saying "i captured this image it belongs to me." and to delete submissions just go to that submission and in the upper right corner it should have a button that says "delete".
well something like "i captured this image from the upcoming halo 3 video game." or something. and you must add something like "halo 3 copyright to bumgie" and stuff of that sort