Sheltering a kid is never a good idea; most other kids, with their abundant curiosity, will venture and learn things in the world that some adult fear them to know; what sex is, cuss words, violence in the media, etc. Most kids become accustome to these things without their parents really knowing. A sheltered kid on the other hand, will be at an ignorant disadvantage; they naive understanding of certain things in life will leave them vulnerable to social exlusion and teasing. That ain't a fun thing to grow up with.
In fact, South Park is a fairly accurate portrayl of how kids really act, with somebody like Butters being one of the more 'sheltered' kids. Although the one specific episode that highlights the danger of over-sheltering children is the episode Hooked on Monkey Fonics; where two homeschool kids are so restrained by over-strict parents that they fail to understand the actual social mechanisms of real life.
If I ever do reproduce (or adopt) and posess
minionschildren, I'm going to freely cuss, talk about vulgar things, let them watch R rated films, etc.
Also, wow to the OP; no letting kids have NERF guns? Some damn idiotic libtards right there.