For example:

• The EU’s car design regulations designed to reduce the number of pedestrian fatalities (as fumed about by Jeremy Clarkson).  While I am sure they will increase your chances of survival if you get hit, by adding to the cost of making a car they add to its price which means that fewer people will buy them which means that more people will walk (potentially adding to the greenhouse effect) which (because walking is incredibly dangerous) will mean more people will get hit and more people will die.
• Bus safety regulations that produced buses that spontaneously burst into flames
• In the UK, the hysteria surrounding the Hatfield crash caused chaos on the railways leading many people to choose the much-more-dangerous roads.  I should point out that in this case Railtrack acted in the way they did not due to a regulation as such but due to the threat of legal action - although it amounts to much the same thing.
• Safety rules depriving doctors of the ability to prescribe.

Nothing yet but you never know...