If you expect people to create accounts on Wikipedia or other projects at
an event, please read this:
https://meta.wikimedia.org/wiki/Mass_account_creation#Requesting_temporary_…
There are some automated anti-sock-puppet systems that prevent people from
creating multiple accounts on the same day from the same computer or IP
address. This can be a big problem if you have lots of new editors at a
workshop, and everyone tries to create an account.
You may be able to avoid this by asking attendees to create an account in
advance (but then they have to remember to do it, and to bring their
usernames and passwords to your event). Otherwise, your best bet is to
follow the directions on Meta about getting a temporary exemption for your
event.
--
Sherry Snyder (WhatamIdoing)
Community Liaison, Wikimedia Foundation