In my 1880 house I tore out the old plaster & lath walls and woodwork and replaced them with drywall and pine or vinyl trim. I did use an old 12" furnace blower in the closest window to suck the dust clouds outside, and wore a respirator. That was well before I took a class in "lead-safe work practices." Ignorance is bliss. It hasn't affected me that I could tell. My ITP, CLL and RAD are probably from something else? Anyway, they say that painting over the old lead-based paint is enough to seal in the lead, but I'd rather have it gone. Any paint eventually deteriorates and starts flaking. I'd think that lead dust from old paint behind T&G paneling could seep out through cracks, especially on those windy nights in this drafty old house. Just my 2 cents. Lead poisoning is mostly an issue for kids up to 6 years old, when little brains are still developing.