When they look frightened it's because they know they've done wrong....that's usually when you can have a conversation with them and school them as to what a safe following distance is and how it change's with the weather. It doesn't need to be an angry conversation. She wouldn't have followed a car that closely why is OK to follow you that closely. With the parking that section of Shaw is sketchy, if the driver isn't a complete ahole I take that section. As it is I don't like driving down that section for the exact same reason.

If you're waving it back, and it doesn't back off. Get right in front of it, so it no longer freaks you out. I hate the corner of the bumper being so close I can see the scratches from the other things they've run over. I don't mind being buzzed but don't shadow me, for exactly the reasons you describe....if I go down ...you hit me guaranteed.