aquestioningjew: regardless of the background, people should be aware that it may be an issue to consider. The fact that an MO doesnt see anything wrong with it, should at least be aware that it may be an issue, but without getting into what MO folks follow or not, they may be aware but just don’t consider it worth noting.
bentzion: I don’t think trying to minimize opportunities for lashon harah is nuts. But do ask yourself why inviting people who are your contemporaries (in contrast to elderly or lonely people) is so important to you. Do you consider it hachonasas orchim if they have a home and means of their own? Is it just to have a good time?