Suggest "don't request responses" for meetings with many attendees
It's so easy to forget to set to not require responses when inviting large crowds, and then you get a steady stream of accept emails. (eg a team social thing).
How about auto-suggesting "you're sending to a large list, would you like to not request responses?" with "yes, yes and always, no, no and always" options
Erika Cox commented
When a meeting particapant accepts a meeting invite, you have to select "Edit Response", "Send Response", or "Don't Send Response". When you select "Don't Send Reponse", your meeting status shows as "None." If you have accepted the meeting but don't want to send a reponse (to not clog up Inbox), your meeting status should show as "Accepted", not "None".