We have all had to cancel plans for good reasons if something more important comes up. So this poll is to gauge public opinion on proper etiquette for canceling plans.
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votes
Cancel as soon as you know the plans have become affected.
Wait until the appointed time of the plans and cancel.
Wait until the person(s) you made the plans with call you the see if you're ready to go.
Ignore it and hope the person(s) you made the plans with forgot.