I was working in the DC Northern Virginia area but I kept my California license tags and California license. I was driving on the north on the George Washington Parkway, which is a two lane divided road next to the Potomac river, and slowly pasted a Park Ranger, who was in the right lane. Then I drifted back to the right lane. He turned on his light and I pulled over.
"Do you know why I pulled you over?"
"I guess that you wanted to talk to someone who was smarter than most of the people you pull over."
"Uh, ... you changed lanes without signalling."
"Did I cut you off?"
"No."
"Did I crowd you?"
"No."
"Did you feel endangered?"
"No."
"Did I leave you enough living room?"
"Yes."
"Then what is the problem?"
"You did not use your turn signal."
"What is this turn signal of which you speak?"
He points to the turn signal.
"That?!? Do you know the technical name for that in the Middle Atlantic States?"
"Please inform me."
"That is the Suicide Lever. Move it up or down and the driver in the next lane will tear the guts out of their vehicle to race to get ahead over so they will be in front of you at the next stop light"
He looks at me for a minute or two and then hands my driver's license, insurance card and registration back to me and says, "Have a good day." I must have hit a resonant chord.