Yes, despite my joke, the boiling point of lead is somewhere north of 3000 degrees °F if there's any real risk of lead vapor, it might be in any volatile trace lead compounds that have formed in or around the surface of the lead, some lead compounds have very low boiling points. Although in metallic lead sources largely alloyed with other metals, the main non-metallic Pb compound would be Lead Oxide, which also has a high boiling point of roughly 2700 °F. So any other lead compounds would be a minuscule trace amount probably comparable to environmental background pollution.
So I can't imagine there's much direct risk of lead vapor from smelting/melting it unless you're using thermite or similar to heat the pot. It's just the handling, splatter, and dust/shavings to worry about.
Wear gloves, wash your hands. Don't pick your nose, chew your nails, or eat when smelting/casting. That's about it.
Venting is for all the other nasties that dirty scrap sources, or fluxing brings along.