Just like cars and guns. When used properly any tool can do it's job without issues. With improper use or neglect the results can be deadly. We are trying to make sure the OP isn't doing something that might be more dangerous than they are OK with.

One detail that I don't think has been mentioned is that some riser's have a "no stunt or off road riding" clause. Just like many of the adjustable angle stems have too. Andy