I seldomly mistype ls as sl but it always makes me smile when it happens. It also doesn't bothers me because you can quickly circumvent it by sending sl to background with ctrl+z and deal with it later...
But now that I think about it I wonder if you can prevent the job manager from back-grounding a task, would be quite the addition to sl heheh.
However, it still leaves ABRT on the table that can be with ctrl-4 and ctrl-\. For that you'd need to disable the binding e.g. with stty and then handle TSTOP the same way I suppose—or just put it in raw mode.
