I dream of the day when we start making computers where a runaway process can't take away resources from the control interface. As in, you should always be able to kill a process, always be able to move and close a window and always be able to send a goddamn ctrl+c via a terminal. Otherwise we're in a classic priority inversion scenario - a lowly process can take away control from the user.
In many cases, you are able to send a control-c, but the process that is generating the output receives it, not the process, the terminal program, that is rendering the text. You'd have to send a signal to the terminal program, which may cause it to exit and not be what you want. And doing is often done with UI controls, like a close button/action on the window.
So it's not just priority inversion that is a potential problem, but also non-obvious layers of abstraction.
