I'm going to toss a rock to the man who fell through the ice.
Why would you give him something that weighs him down more?
I want to use him to set an example for why you shouldn't walk on lakes during winter.
If you see someone who's fallen through ice, you need to do everything you can to help them rather than hinder them. If you don't help them, they could die of hypothermia. Try to get help as quickly as possible, or assist them yourself if you're able to do so safely.
Nah, let him die.
That is not okay because you will feel bad about what happened. You should try to help them instead of harming them even more. They need your help.