You do have a point there Creeky. The two 'home grown' terrorists that so cruelly murdered Lee Rigby in the street and in broad daylight were both found to have been long term users of Cannabis, so they were probably not of sound mind at the time. Some people who suffer mental problems do focus on things or people that they perceive to be problematic to the point of obsession, whereas 'normal' people would have a good rant to vent their angst and then forget it. A bit like some of us on here do?😀