Ok, I'm sorry, but this is incorrect.
If your snake is that small, you need to check to make sure it doesn't have parasites, because your snake could die as a result. I'm a positive thinker too, but that's just ridiculous with an animals life in your hands.
Pet stores can easily and have very often presented parasites in their prey, you can not tell by looking at one.
A fecal is not that expensive, if it has parasites and is ignored, then it will get much more expensive.