[tl;dr for non Brits: UK labour union considering strike at 2012 Olympics to cause disruption] Personally I think it would be suicide - it would trigger a campaign to change Union laws I don't doubt. But Len McCluskey is putting it out there anyway. In a Q&A with the Guardian you can get more specifics. He's looking at what leverage the Union has in terms of buses and things like that which could actually create an impact during the games. http://www.guardian.co.uk/politics/2012/feb/28/len-mccluskey-unions-london-olympics?newsfeed=true You can see what Unite are protesting about at their site: http://www.unitetheunion.org/ The NHS reforms the big one at the moment.