Oh it definitely happens. I'm a young millennial and I have a friend my age who deals with mental issues because he ate lead paint leftover in their old house as a child. Lead was so prevalent at one point that getting rid of it all isn't as simple as flipping a switch.

Edit: [wasn't -> isn't] There does not in fact exist a switch that we can now flip to remove lead. Thanks @Imgonnatrythis@sh.itjust.works.