Posing as an IT person is the best way. I remember when NationsBank bought Bank of America (yes, it wasn't a merger) a friend bet another friend that he could g

Posing as an IT person is the best way. I remember when NationsBank bought Bank of America (yes, it wasn't a merger) a friend bet another friend that he could get BofA root access. He called the branch manager saying he was from NationsBank IT and was going to do a pre-merger inspection. He showed up, asked for the root passwords of the boxes in the branch, logged in, left a MOTD message, then left. Needless to say they beefed up the training on that once the merger closed.