[aix1]

Lead weights continue to be widely used in diving: https://en.wikipedia.org/wiki/Diving_weighting_system (there's a section on materials and toxicity).

[halfdan]

They are, but as a diver I will never touch them unless they look in proper shape and are the types wrapped in some other material. Some fishy dive centers will have the old style raw lead blocks..

[kevin_thibedeau]

You breath TEL whenever you go near an airport. That's a far more pressing concern than incidental exposure through contact. If that's your threshold you may as well isolate from zinc and copper too.

[elihu]

That generally applies to small airports. Single-engine planes often use leaded gas, but the big jets don't.

[postalrat]

Your risking your live going under water but are afraid of some lead?

[fy20]

In fishing too, although they are starting to be banned in some areas:

https://en.wikipedia.org/wiki/Fishing_sinker