Teams invites random people to meetings

I know I've seen in many cases - that when people are inviting "people" the actually are inviting an office 365 group of people. We used to create a new Planner for Onboarding people - using their name... but we've found this creates an office 365 group in the organization and many people don't notice the difference when adding an invitee. The Group is the "white" dotted contact and has the "@CompanynameOnmicrosoft.com" email. We've changed our procedure to include "Team-PersonsName" when creating a Team/Planner/etc to help avoid this.