How do you, kindly, deal with an annoying child that won't leave you alone?

That's exactly why I have made the choice to not have children yet, maybe even wait a few more years until I do. I'm still young and finishing up university. I love the kid, but go damn can they get so fucking annoying, especially since they don't have any concept of annoyance, boundaries, the difference between right and wrong (for the most part, usually only through being told what's wrong, but no first-hand experience to evaluate things in their own thoughts), or respect for others.