We shouldn't. And if we were to make it "fair", anyone who is willing to participate in that kind of punishment would then be brought to justice under the same rule of law. So if one is willing to be an executioner, they to shall be executed. So the baddies would get their justice in the end too.
Then, we'd eventually either run out of peeps, or at least the "death is the answer" ones.
I just went through the last 10 days of posts in the community. This is the only PC one that shows up in that time frame. Other artists have multipes in that time. So, less than once a week... guess there are different ideas of what is spam.