Personally, I rarely get involved in anything unless it involves something that is harming someone or could be reasonably construed to result in harm. For example, if I see someone's dog off-leash at the walking trail I don't call the police to report a violation of the leash law. If the dog is running a 1/2 mile ahead of the owner or is snarling at every creature that approaches though, that's a different story. Likewise, if someone is operating a drone in a manner that is likely to cause harm I may report them, but if someone is simply breaking a rule (e.g. flying over the reservoir) I'm going to mind my own business.