One thing that annoys me is when a police officer, even here in the US clearly does not agree with a law. I was under the impression in one of my government classes in college that police officers could in fact choose not to arrest someone, but a lot of the time they opt-out of making that decision for whatever reason. I never looked if in the UK it's similar, but it always bothers me more when a police officer is "just following orders" especially when at least here in the US, they can just not charge someone at their discretion, because sometimes the law is just wild.

We also see it with judges. Our system isn't perfect, but it allows for people who strongly believe a law is unjust to step in.