I get to see this type of behaviour almost everyday on my way to work, I just move on and keep riding. If someone jumps into my lane or move too close to me I then ride defensive and move over, give them a look that they made a mistake. Most times drivers don't see us and apologize.
It takes all types to occupy the road. Enjoy what you have, cause they may never ever ride a motorcycle, own one or simply pissed at your enjoyment.