A knife can be used to commit murder. Should we fight knives?
You are obviously wrong when you say surveillance can't exist without the law. Like knives are not used only to commit murder, surveillance is not used only to enforce the law. We all use some form of surveillance everyday to get and verify information and it has nothing to do with us wanting to enforce the law. Even my cat use surveillance everyday and I can assure you it doesn't care much about the law.
Also, I find quite strange that you seem to depend so much on authority to determine what people can do when, at the same time, you pretend to fight for your freedom. Unless you are yourself in a position of authority, it doesn't make sense.