Tailgating is the lowest form of sh*t driving. It shows you up to be a cretin of a driver who has about as much road craft as a steaming pile of dog sh*t piloting a roller skate. Anyone who tailgates me ends up going a whole lot slower than they would if they just follwed safely Their loss really, the closer you get the slower youre going to be going, so up to you mate!
The biggest problem is that those that do it are so ignorant, they dont even realise theyre doing something dangerous. Theyre just servile scum who follow you by 18inches for the sake of it. Half the time they dont even overtake when given the chance. They often have no plan of overtaking, and arent even in a hurry.
I wouldnt waste my energy slamming the brakes on though. Most of these parasites are probably in company cars anyway, so theyre not going to give a toss if they hit you. The others are so brain dead theyre not going to even consider the idea that its their fault. Then theres the small minority thatll probably end up putting a stanley knife in your stomach and kick the sh*t out of your car while you bleed to death on the pavement.