I haven't been able to pinpoint a profile on "tailgaters"...
I've been dangerously tailgated by young AND old males in F150s, teens in Civics and Cavaliers, and soccer moms and harried businessmen in Expeditions and Escalades.
The only common element is their desire to push traffic along to what THEY consider the a "desired" speed...usually 15 to 20 mph over the posted speed limit. Any attempts to shake them off nicely, will do no good...do so aggressively, and suddenly, you have a "road-raged" individual behind you!
However, if you perchance try to lose the perp by driving at a speed that should satiate his/her desires, it's interpreted as a "challenge", and you find yourself a reluctant participant in an on-road duel...you accelerate to 75 mph, they want to go 80!
So you slow back down, which then infuriates the tailgater...so at the first opportunity, the tailgater blazes past you wrecklessly in a huff, thus confirming (to themselves) their superiority over you!
I think as the economic issues continue to frustrate more and more vehicle-owning individuals, this trend of tailgating will worsen.