I have crates full of Gilbert S gauge track, none of the track pins are sharp pointed and even as a small child I never cut myself or punctured a finger with a piece of track. Most all the track pins are slightly rounded off at the ends.
Mark's post of the Gilbert catalogue page eloquently makes the point of the straight versus curve track ratio. In a system that uses 12 curves to complete a circle it requires a lot of space to use more straight pieces than curves. An around the walls would be the easiest. My dad picked track plan #9 for our layout. Adding 14 more pieces of straight track would have made it a really large layout.