When you see a troop on your team is obviously messaging or on the menu screen in game, build walls around them with the ladders facing out, some loadouts they can be stuck awhile
^ This is far more clever than what I have done and seen others do when somebody takes a knee.
The more juvenile among us just run up and do the t-bag dance around the poor sap.
I forgot to mention a favorite,shoot at your teammates hawk/tank/grizz before they get in it so its in flames by the time they hop on, if they bust a wrench out, rinse and repeat
THIS IS STARHAWK!!! lol