Are speed bumps dangerous?

I know they were meant to prevent people from speeding but what if someone isn't familiar with the road and they are hauling ass on their car and they hit a speed bump and lose control and run into someone else killing them as well? I get that for most people that know they are there that's good but speed bumps are sometimes hard to see and even less if you don't know the road lol
Are speed bumps dangerous?
Post Opinion