Yeah I do a similar method whenever I'm pink...usually have to kill blue because he's a bastard that wants to fight. "Oh hi I'm blue I'm a pussy that can't build fast even though my door is the easily accessible one." Now that the screenshot reveals to everyone that PINK IS NOT FUCKED ON THAT LEVEL, maybe it'll stop. Seriously, if you don't suck as shaman, you'll have no quarrels with friendly competition. Nothing irks me more than building straight away only to be spirited away; insult to injury when the other shaman sucks.
I liked the portals because it got around door blocking, another practice I disapprove of highly. It is promoted on levels where the shamans start at the other's door.