Personally, I'd rather hit a door at 30km/h and sue, than get run over by a frustrated driver of a 3000lb cab from behind and be the one sued and charged.

I'll try to keep myself under control here as much as possible.... Been there, did that, done that.
Result = 5 weeks in hospital , emergency surgery, seperated ribs, concussion, 10 tubes in my body at one time. Possible threat to future career and life ( yes I saw the light at the end of the tunnel - more than once.) No need to go on...

if the lane is narrow, I take an "aggressive" position, and intentionally place myself in the lane so the cars *can't* get around me - it forces them to use the other lane entirely and protects *me*. Usually this position is to the left-of-center of the lane. I also do this in areas where the drivers are typically more aggressive - wide lane or no wide lane. I hate having cars "buzz" me because it leaves me no room to react to something in my path.

I whole heartily agree with this advice. Many drivers do not understand a cyclist position. It's often much safer to "force" drivers out and around you than to be sqeezed into an unsafe situation. I may really tick people off, but then being sworen at hurts a lot less than a car door.