Practice proper lab safety for chrissakes.
Wash your hands after dealing with chemicals and/or dangerous materials, such as flux or lead. Don't let your small children near it. Don't eat or drink in the lab.
The spread of the hobby through cheap dev kits and stuff has made people ignorant to the fact that, yes, these are potentially dangerous chemicals like any other, with MSDS documentation and proper handling precautions that must be taken.
You don't get lead poisoning unless you're improperly handling the stuff. Give me a break.
Arguing that "lead free solder is better for you" is absolutely terrible. That's like saying "drinking straight bleach is better for you than drinking bleach with arsenic mixed in."
None of these should even be coming into your body in any way, shape, or form and if they are, you're doing something horribly wrong.