Historically people have rationalized all sorts of unhealthy activities just because everybody seemed to be getting away with it with no ill effects (at least at first)... smoking, excessive drinking, drug use, overeating, exposure to overamplified music... etc. etc. etc. I don't much give a crap because I seriously doubt that anyone who has "contributed" to this thread:
a) is an athlete who takes his physical conditioning seriously or...
b) knows anything about the actual scientific research regarding the long term effects of lead exposure.
Yuk it up morons.