Fair enough man but you will always be viewed as suspicious driving with a hood up. I personally can't do it if I wanted. It obstructs my vision too much if I'm looking round etc. On a related note I've been stopped a couple of times and actually boxed in by up 4 police cars (lothian and borders police in Edinburgh) and basically accused of 2 seperate hit and runs in 2 different cars. Never treated badly but definately viewed as a criminal before they actually spoke to me. The attitude of some of the traffic officers around the central belt of Scotland is shocking. Regular beat bobbies tend to be alright once they establish the car is yours etc.