Re: Giving the users what they ask for......
Had a similar situation at a former employer.
The sales weasels went out and bought MacBooks and expected IT to support them.
They were not too happy when it came time to support them.
Our CIO's reply was short, and forceful: "FUCK YOU!!! I told you that we do not support Macs, and if you go out and bring your own, you are on your own." It was even sweeter when they complained to the CEO, who supported our CIO.
Many a sales weasel was pissed off; but they were warned.