I know questionnaire works best as part of a course with enrolled users, however I have created a survey for folks without logins, and have allowed guest access. It works just fine for users to submit responses, but I just wondered if there would be any reason it would be a bad idea to have dozens of different folks taking the survey as a guest in different locations at exactly the same time? Will questionnaire be able to handle those guests as different individuals? I assume it will be ok, since Moodle can handle many different guests at the same time, but I just wanted to check.
Well I think it should be fine -not that I have any authority but I wouldn't be too worried personally.
I agree with Mary. I have done numerous surveys with guest access that were accessed simultaneously when presenting at conferences and have had no problems.