Questions, answers and comments you make on Ask cannot be self deleted. The only items which are deleted are when moderators determine they are against guidelines. This is a good reminder to always be careful about what you say online, because what you say on the internet, stays on the internet.
Well you cannot delete or remove anything on your own only the Moderators can, unless it is found inappropriate or violates the guidelines. If you have any questions at this time about Community Guidelines you can check out http://www.ask.com/about/community/guidelines?oo=0 Hope that helps, Your welcome and have a wonderful day :D