What is the most EVIL code you have ever seen in a production enterprise environment? [closed]

Answer 1

I think that it was a program which loaded a loop into the general purpose registers of a pdp-10 and then executed the code in those registers.

You could do that on a pdp-10. That doesn't mean that you should.

EDIT: at least this is to the best of my (sometimes quite shabby) recollection.