Yes, the thing is when someone tries to reach the webpage, there are special characters that difficult the navigation a little, for example:
When a user tries to reach the g3ekarmy wiki page, it writes:
http://wiki.softwarefreedomday.org/2014/Mexico/Mexico%20City/g3ekarmy
If you don't change the word from "g3ekarmy" to "G3ekArmy" specifically won't connect.
Second problem is that they put the address without the space on "Mexico%20City" so if you don't write the address with the correct parameters you wont reach the wiki page of your team
So you van use a shortened service like "bit.li" or "goo.gl" to shorten the link and be more user friendly, the "goo.gl" service also auto generate a qr code so you can put it on your posters/promotional to help people reach the wiki page of your team.