During the past Wikimedia Conference and the preceding days, a lot of Wikimedians came together and many of them did not know anyone and where wondering who in the hotel also is a Wikipedian/Wikimedian.

To make it easier for users, a page has been published to help them:
https://meta.wikimedia.org/wiki/How_to_recognise_a_Wikipedian

The page describes what you can look for with the subsequent levels for a higher level of recognisability.