Punishing selfish player in team game

I will probably get a lot of downvotes, but I have started to get fed up with selfish players in teamgame (unranked). I have had pocket stone wall between us when as a flank I am dying and asking for help. I have people ignore messages throughout the game, only later come back with requests with perfect English. I have had people refuse to wall in Black Forrest and talk back as if I am the idiot (and later resign when enemy comes and decimate them). This doesn't even include those players who boom into resign, without making any army or sending any help.

So I have started to think how to punish those players before I die:

• In Arena send a military and keep their gate open.
• In black forrest, wall for them and delete it when enemy comes near.
• Create an onager and attack ground their TC/villagers.
• Laming resources/walling in.

What else can be done, when changing team is not an option?