This forum is for people who want to help others with issues, organize events, etc. It seems like you came on here to brag, but are not providing any helpful details. You must be a computer wizard to disable a information gathering system that is integrated into the electronics of every vehicle for the past 15-18 years. Cudos to you, thanks for sharing.
To access the information stored, law enforcement would need your written consent or a search warrant. That means you would have had to have done something really stupid, like kill someone while driving drunk, for them to gain access. For the vast majority of vehicle owners, this is a non-issue. The information stored is usually only a few minutes prior to a event, such as a collision. It could actually help you if you have done nothing wrong.