I'm not paranoid about lead exposure, but I'm getting much more careful. Talking to a young guy a while back, he had been casting for a while and was proud of some 45-70 bullets he'd made. He then pulls one out of his pocket. It looked shiny and a little worn like he had been carrying it in his pocket for some time.
He looked at me like I was silly when I said I thought that wasn't a good idea, as he would get trace amounts of lead on his hand every time he put it in his pocket, then ate or rubbed his face or whatever.
I've picked up brass at the range from time to time, and filled my coat pockets if I didn't have a container handy. Brass has traces of lead, as well as the dust and mud from the gravel at the range (they shoot lots of steel targets so I expect that dust is loaded with lead). I suppose my coat pockets now have traces of lead that I should be a little concerned about. No I don't think I'm paranoid but it all adds up.