Anyone who constantly feels they have the need to use the brakes on their cars.

Mostly,
-old people
-cautious drivers
- the occasional drunk

These types of people use the brakes anywhere where:
-there is no traffic light
-there is no stop sign
-there's nobody around (See brake nazi)
-on the fast lane of major highways (i.e. I-95)

One other way to spot this driver is that they:
-never follow the speed limit (they drive 45 in a 50)
-they're have a lot of cars behind them
-they drive either a "fuel efficient" car or a duster
-are probably lost

tips to get past them
-just cut a lane over when you get the chance and have your foot to the floor when you pass.