Well, the brake-check & other stuff was unnecessary...however I do have to wonder why you were in the left lane with no one else on the road. Why didn't you pull over?
I think you'll find that most people in the world believe in keeping right except to pass. It's the law in most states, and it's the proper thing to do, even if you're on a motorcycle. When I rode I did it.
Handy guide for driving on highways.