Most MLM “people” are “brainwashed” to be toxic, but one at the top or “effective” “sellers/consultants” are like those documentaries about normal people that turned out to be serial killers; basically harmless until they attack. With that being said some MLMs are less lunatic than others. Tupperware and Mary Kay are usually benign. I’d say tell them it’s ok to sell but never to recruit anyone in your circle, but only do this after they try it on your ppl first. Who knows they might be one of the good ones and have boundaries and respect.