My car isn't exactly the easiest to take off considering it has a Spec Stage 3 clutch, which is very grabby. It took me a couple weeks to get it down. At first, I just used the e-brake to hold the car. When the car started moving foward, I unlocked the brake and go vroom!
A couple days ago, a lady in an SUV was too close behind me. I revved to "scoot" up a little and she apparently got the message and backed off lol
When I had the automatic, I really never thought about this. I'm sure I was guilty of pulling up too close behind someone on a hill. I think many who have never driven or ridden stick does this because they don't know the actual mechanics of a manual trans.