I agree that we may not have heard the full story here, I wouldn't be surprised if he pulled over.
My issue is, they can either say he was irresponsibly using his lights.... fair point. maybe, or at least it makes sense.
However, if their issue is "interfering with a police officer"... if they are not "hiding" (as they are not supposed to do) then what is the problem? If he danced in the line of sight of their speed gun then fair enough, but all he is guilty of is getting people to slow down... erm... hardly a criminal matter, is it?!
Like I said, I don't think we have the full story here, but either way this case is nonsense.... the courts allow people warnings for some pretty serious stuff, yet this guy is labelled a "criminal"... really?!