Mamapedia has site moderators. Those moderators review questions. If they are deemed inappropriate, then they are removed. You can read the Terms and Conditions when you post a question.
Flaming - intentionally calling another person out and mocking or demeaning them...
Swearing - for the most part - swearing is not tolerated. I know there are times when it has been looked over. But if there is swearing and someone reports it - it is pulled.
Selling or soliciting - you can't offer your services for something by "asking" a question - like one person came on and wanted to sell her baby toys. If someone asks a question like "where can I find baby toys" and another person responds "I live near you and have some for sale" that is fine.
There are people who go back and edit their questions and remove all the words, but unless the question is reported and pulled, it stays there...just like accounts, if you ask Mamapedia to delete your account, you will lose access to your account but all of your questions and comments stay.
Hope that helps!