Guild Wars 2

The only difference between map chat and team chat in wvw right now is the colour. No functional difference at all.
So, my suggestion is that map chat is only seen on the map you are in and team chat is seen across all borders of your server. Makes sense. That would make informing others of the situation much easier and would allow for a quicker response when defending an objective.
You could also have a timer between sending messages to avoid spam, or not. Its fairly easy to differentiate between idle chat and a call for defence.

at the moment, team chat has no spam prevention. That would be the main difference

Although I would support team chat that is visible across all maps.

pls ANET !

Let the commanders type without that msg of excessive on msg pls !

I actually love this idea … Barring it not creating chaos in info feeds.

It might actually cause inadvertent map jumping when someone panics over a 10-man “blob” though. And unless you were a vet and knew all the building names (map colours rotate) shouting Northeast Tower would cause mass confusion…. Shouting Cragtop would be equally confusing since maps and ownership does rotate. Although it would be a good memory exercise, lol.