Hm... Perhaps you mistyped the name of the event. The name is "LinuxCon", and has mostly to do with "open source" than with "free/libre software". The only event that is known and surely about "free/libre software" is called "LibrePlanet" and happens usually somewhere in North America.
For more information, go to LibrePlanet.org, and click on the "Conference" link. Besides, be sure to participate on the LibrePlanet.org wiki and use it to organize your local free/libre software related actions and/or groups. If you are organizing some action that involves demands to someone who's not aware of the importance of free/libre software (like the 90% of all the people who develop websites nowatdays) don't forget create an action item (see the list of current action items <https://libreplanet.org/wiki/Action_items>) and create an action item yourself (you **do not** need to edit the "Action items" page directly, just visit **one** of the items, copy their MediaWiki source, and make a page anywhere in the same wiki, adapting that source for your case, if done right, the table on "Action items" page should update after around 30min or less, and people who are subscribed to the Atom feed link given in the "Action items" page should also receive such update, so that they can act upon seeing an action of their interest). While some MacBooks are compatible with fully free/libre system distributions (as proven here: <https://h-node.org/notebooks/catalogue/en/1/1/Apple/undef/undef/undef/compatibility/undef/undef/undef>) and we have to spare the MacBook user until he does show which system distribution he's using, you **are right** with one point: He "indirectly" contributed to the "survival" of one of the various non-(free/libre) system distributions (in this case: macOS), by buying a computer pre-installed with it.
