The thing I detest about practical jokes is that, a huge percentage of the time, they are perpetrated by exactly the kind of person that would not be able to take the 'joke' themselves if someone did it on them.
They also tend to be used as a cover for bullies - 'it was only a joke mate - can't you take a joke?'.
I'm sure in some cases that may be true. In my expereince I have been on the receiving end more than the giving - Richard Prew and his Dave Clark 5 wind up being a case in point. Me doing a Blonde update asked "What's it like playing poker instead of being in the band Dave?" A note to the wise I can be gullible and easily persuaded - a welcome guest at BB5!
