Well, I don’t know if being too smart can really harm you but definitely being a nerd and exceeding at what scholar curricula would define as intelligence can be certainly dangerous when trying to cope with the real world.
And if you put all those nerds together in a geeky World, then the results can be complete isolation from reality and absolute absence of any trace of emotional intelligence.
A Google employee writes a post telling us that something like this is happening at Google. Too much intelligence. Imagine!