I've "heard" of officers charging "obstruction" for drivers flashing thier lights, etc before a radar zone.
Never actually knew anyone who did it though.
I don't think the charge would stand up in court and you *(the LEO) would probably get laughed out
I know I'd think it's pretty Charlie Sierra of them to try
.
One charge that "could" cut the muster is failure to dim headlights within X feet of oncoming or to the rear of other traffic...but again its a crap ticket and I don't think most judges/magistrates would appreciate it being done.
I know the judges/magistrates were busting balls her in Hillsborough county and in Polk they still don't like it, for us writing failure to obey a traffic control device (speed limit sign) instead of the actual speed!