Uh, oops, I meant to scroll within this app, but instead I’ve just sent porn to some girl on the bus
Oops, I meant to scroll up but instead I’ve sent our company’s sales figures to our client sitting in this meeting
This is not an engineering limitation; only an engineering problem to solve. My e-ink tablet can, and does, differentiate between three different types of swipes and taps, and it never does something I don’t ask it to.
Make it a 3-finger swipe. Hell, enable a confirmation dialog if you’re that uncertain about your ability to control it.
It’s like being afraid of accidentally running "sudo rm -rf /”, and just as easy to prevent accidents.