When I just did the ‘retrieve the cannonballs from the Skritt’ event (Gandara server, Plains of Ashford) the Skritt did not turn hostile when I picked up the cannonballs.
Or to be more precise: they briefly turned red, gave their little speech, then turned yellow again and did not attack or move in any way.
No big deal, as the event can be completed normally, it just makes it somewhat boring
(happened on a downscaled lvl 80 character)