Usually, when we say "kill it with fire," we're speaking in hyperbole.
We don't actually want to burn our house down because a spider laid eggs in our bathroom fan, but the phrase perfectly encapsulates that extreme feeling of revulsion we get when we discover that.
This list isn't meant to give you the heebie-jeebies — though, it probably will — but rather, so that next time you find something awful you'll be able to say, "At least it's not as bad as that one thing I saw on the internet."
Yes, there will be a lot of bugs in these pics.