Generally, bricks are used in lobster pots, at least in the NE.
If that lead was a lot closer I'd pick it up to melt & pour into SS tubing for excellent cod jigs.
Plumbers who still have occasion to install quiet heavy cast iron waste piping may have a good use for the lead.
Sailboat keel ballast or correction ballast for powerboats with a beam tilt?
Right foot lead Crocs for race car drivers?