I'm going to explain that space heaters will short circuit if plugged into an extension cord
Why are you concerned about how people use space heaters?
Because people are stupid and don't ever think things through.
If you see someone doing something dangerous, it is good to stop them and explain what they're doing wrong. But you shouldn't call them stupid; that is unhelpful and won't make the situation any better. You should think more charitably about others.
Shut up. You're just attacking me about my word choice and you won't help. You're just as stupid as everyone else.
I am sorry that you feel like I am attacking you, I didn't mean to. I just meant that they might be more willing to follow what you say if you are nicer to them and don't call them stupid.