Some people use their laptops in wider situations than others. Having had creases pressed into my forearms by the edge of my MacBook while using it in various non-ideal and uncomfortable seating situation, usually on the go, I can easily say you are not one of them. Implying that we’re being dishonest or somehow incapable of using a keyboard is a bit insulting.

Huh? I don’t think anyone here is dishonest or incapable of using a keyboard. (Indeed, I’m convinced that idlewords is one of the most honest and generally capable people around.)

I said people who are digging their forearms into their laptop edges are probably bending their wrists down in a way that puts strain on the tendons used for typing (not to mention putting direct pressure on the tendon sheaths for the finger flexors), so they should be careful about RSI.