Those who check will be looking at URLs, not content.
In the UK, if I deliberately look at a user's files and by chance find kiddy porn in there, I have committed an offence myself. This is not exaggeration - I have a document from the police detailing the procedures I should go through to provide sufficient defence against being charged, or later in court, if this should happen when I am following orders to investigate such things or if I should choose to bring it to the attention of the authorities.