Was working with a NOC technician who was responsible (along with some others) for a pretty large EMEA mobile network, with many millions of subscribers. There was an RFP to update their SMS/MMS system and a certain Israeli company came in to do a site survey, or installation or something in the network data center.

Anyway the long and the short of it was one of their technicians was caught with the previous vendor's SMS-C prized open and some USB device insert into it. Similar response to this, a lot of hollering and hair pulling, but ultimately no contractual or legal implications.

I guess it happens higher up the food chain too.