The soft serve thing is because there can be remnants of icecream on the outside of the machine/inside the nozzle which end up at room temperature. Unless it's cleaned really well & often, then there's something of a listeria risk there.
I've only been pregnant the once, and had soft serve a couple of times... if I were to get pregnant again I think i'd be a lot less cautious and just eat it if I wanted to :P
And, erm... that list of potential ingredients? There are a bunch of logical fallacies in there, at least...implied ones. So WHAT if a compound, in another form or different quantities can have a scary-sounding use? Water can kill if you breath it in, doesn't mean you shouldn't drink it.