/friend Player.1234
/unfriend Player.1234Adds a player to your contacts list or removes them. Contacts are account-wide, so you see them online regardless of which character either of you is on.
Posts to map chat, which is the channel that actually organises open-world metas. Keep the wording short — map chat scrolls fast during a meta event.
/map Tail up, squad in LFG under "Dragon's End"