Originally Posted by texameradian
I'm not sure if I'm doing it correctly or not. I throw the rocks, the notice it. Do they have to investigate or no?
The achievement says 'fully' distract so yeah I guess they need to investigate.
Personally, I got this on the mission with all the ships in that cove where there are loads of dudes wandering about. I was throwing about 10 rocks a minute at various guards and it unlocked in no time.