Seriously, this poster's attitude is WAY wrong! Instead of throwing up barriers which will only piss off your customers (which now even Microsoft knows is a bad thing), you need to solve 'why' they are asking for this in the first place, and then giving then a viable solution.

That customer obviously has a valid business reason for asking for this --probably the condescending tone he gets whenever he asks for a one-off report-- and the DBA better jump at the opportunity he has to show how he can meet a client's need. If that means getting better metal to handle the increase in adhoc queries, so be it.

The poster needs to remember it is that customer who generates his pay-cheque, and lay off the 'top of the food-chain' crap that'd see him fired if I were his boss.