Oddly enough, I'm a small guy and nobody threatens to beat me up. Perhaps the people of Leeds suddenly have a code of honour? Maybe it's because I live in the only nice area (it's the 5th most robbed area of England - that should explain how shit the rest of Leeds must be).
I once got chased across a field by some wannabe gangsters, but I was with my friends and we had a crate of beer, so that's understandable, and I once got mugged, but that wasn't a threat, nor was it personal; they were just angry, misunderstood youths (I'm hoping they have both died in a lot of pain of course).
I have been threatened over the internet however, because I insulted some guy's shirtless picture. I'm a man of integrity though - I would still do it to his face (I refuse to ever become an internet jerk - I say the exact same things I'd say in reality).