turn the other cheek
How about write all the facts down that you can remember. That way you can defend any complaints should you not hear about them for 6 months etc.
Then once that is done, get on with life. ie don't rat it to the company. we have too many us against them fights already.
I am not even slightly saying that I think the ISM actions are justified, however if you want some lattitude/tolerance one day, it might be appropriate to give them some occasionally too.
End of an LA remember they get tired too.
P.s. I too have sat in the bus waiting over 30 mins for CC to clear customs etc. it's very frustrating.