Can a server be full?
Servers definitely can be full. You can check by going to the character select screen, clicking World Selection (in the bottom left corner) and scrolling down to find your server. (Incidentally I just checked and Sea of Sorrows is full.)
Having said that the only thing they cannot do if they’re on a different server is play WvW with you. Guilds are region-wide now, so anyone on any NA server can join your guild, and will have full access to all the upgrades, guild missions etc. and can contribute influence.
Danielle Aurorel, Dear Dragon We Got Your Cookies [Nom], Desolation (EU).
“Life’s a journey, not a destination.”
“Life’s a journey, not a destination.”
Go to the character select screen. Click on “World Selection” (bottom left corner). That will bring up the list of worlds. If a world says “Full”, that means it’s full and you won’t be able to transfer to that world.