We've a "Pop-Up Shop" in our street. It sells nasty perfume and miracle weightloss liquid. Innocuously silly. Until it put up signs saying "FREE SEMINAR: Earn more cash for xmas!". You just know what this means - some poor sods are going to be going door-to-door, plaguing their friends with nasty perfume and diet water.
A few years ago I was looking to buy a flat in Cardiff. One seemed incredibly cheap and I emailed to ask for more details. The next thing my phone rang: "We would like to invite you to a seminar about..." I hung up.
You just know what it is. A small group of earnest people, some taking dutiful notes. A snake oil salesman.
Our local snake oil salesman is at least wearing his nasty perfume. The problem is, it's clearly intended for ladies, so he smells like an aunt's toilet.