[from an old doctor's office joke about a patient with a trivial
complaint] Stock response to a user complaint. “When I type
control-S, the whole system comes to a halt for thirty seconds.”
“Don't do that, then!” (or “So don't do that!”).
Compare RTFM.
Here's a classic example of “Don't do that then!” from
Neal Stephenson's In The Beginning Was The Command
Line. A friend of his built a network with a load of Macs and
a few high-powered database servers. He found that from time to time the
whole network would lock up for no apparent reason. The problem was
eventually tracked down to MacOS's cooperative multitasking: when a user
held down the mouse button for too long, the network stack wouldn't get a
chance to run...