Lol the kids will freak out because thermomixes are so loud! At playgroups I've been in, they actually make a point of telling you (in the short handbook) when you join that it's not an appropriate place to flog your new "I don't want to go back to work so I'm doing direct marketing" strategy. As you're finding, it's a great way to turn people off!

Time to move on and stop letting it affect you.