One of the conclusions that can be drawn from this little exchange is that if a cat was Prime Minister the world it would be a pretty scary place. Fortunately they are all far too lazy to even consider global domination.
Other cat deterrents I have heard of include: urine (yes Cazzie it occasionally works for a very short space of time: perhaps a combination of this idea and the water pistol scheme??) mothballs, orange peel, eucalyptus oil,chilli powder, rubber snakes, spiked belts (for tying round trees - similar to the things that members of Opus Dei tie round their thighs - to stop cats climbing after nesting birds), jars of disinfectant, cinnamon, pipe tobacco, red wine vinegar, tinfoil, live lobsters, garlic, and ammonia (only one of these is a joke).
