[thxbb12]

I am with  Rover, built in hoods are a bit silly, for a very obvious reason. Hoods have a protective role against impact, next to protecting the front element from bright light from outside the FOV. When you ding or break an add on hood, you can just replace it easily. When you ding the built in hood, you have to get the lens repaired. Luckily I have not had my 135mm Nikkor with built in hood get into an accident (it has a built in hood), but my 70-200mm Canon's hood saved my lens when I dropped the lens, and only the hood needed replacing.

The main reason to use a hood is to avoid flare and this is exactly why I use my lenses' hoods for
I've never banged a hood or replaced one due to damage.
I'm not sure what you guys you do with your gear, wrestling or Spartan races maybe?