After sharing a meeting link, people can re-use it to book again and again. This can hijack a calendar, especially if they create multiple meetings for follow-up questions that could be easily answered by email. I wish there was a way to put a limit on the number of times a meeting link could be used by the same person, or even have an expiration that could be set so that after the meeting link was used it would expire within say 1 day, 1 week, etc.