How do you deal with Shoulder Bargers?

There's that one special moment you realise that 'ardnut isn't prepared to deviate from the collision they're so determined to cause. It's at that very moment I shift my whole upper body to slam my shoulder and take them fully by surprise. I must add that I'm a solid 16st guy who happens to look like a fanny, so I've had plenty of practice. For me, the most ridiculous occasions are those when you're walking along a narrow pavement where single file passing would be the standard practice of etiquette for most, only to be faced by two full-grown adults coming towards you. You pick a side - etiquette, all three of you continue walking, then just before collision time, the person in front of you hurriedly posts themselves into the narrow gap of escape - thus looking pretty stupid. I hate it, it really does boil my piss, anyone who causes that type of situation is, frankly, a pathetic runt in need of a beating.