Pull your pants down to your knees; your knees are in front of you when squatting and your pelvis rotates, so the feces will land behind your heels. Maybe wearing very baggy pants there might be a problem, so don't do it if you're a teenager and the year is 1994?
Ah, these are sommon in parts of the middle east I've lived. I've always done a few minutes of slavic squatting a day just to make sure I'll never crap my pants if I find myself constrained to using one of these.
Yes, do it. It's doable if you're not a very large person. Just position yourself accurately so the output goes in the exit, not in front of it or behind it.
Or if you're in Asia, just get an Asian style squat toilet.
In a Western toilet with water in it, the splash is always there, whether you're sitting or squatting.
The only time there isn't any splash is in a proper Asian squat toilet, as it doesn't hold water. The output can be drained away as often as needed, again with no splash.