I took the MSF Class when I got back into riding about 10 years ago, it was invaluable, I learned to handle a bike with a lot more confidence. It really helps!
I agree that you really find out a lot about people when you are on a bike, you'll run in to people as you described and worse, the key is to learn to spot the @#%holes and stear clear of them.
I was almost sideswiped on the freeway here in LA the other day, I'm signaling looking right and moving over lanes at a decent 70mph and with one lane to go here comes mondo deisel truck at 90mph from behind a rig, on the blind side and in the slow lane, that was close. I had to swerve to the left to avoid being hit.
Enjoy your Scrambler.