Michael Jackson was an amazing crowd puller: he just needed to turn up in almost any city in the world and within short space of time, hundreds of fans would gather around to cheer him and ask for autographs.

It seems like everybody's an expert in everything these days!... A politician just needs to make one unpopular decision or comment, for hundreds of armchair critics to start jumping up and down on Twitter and social media condemning them - even demanding their resignation!