Diego will flag verbally, and then ignore it to suit his own convenience, in spite of decisions being made based on his announcement. Therefore - do not accept a verbal flag from him. He made this strategy clear in post-game comments, and was fully accepting that this was bad form and unsporting.

Halldór: red, wtf? Diego11: ok war all Diego11: I atack all Diego11: for win Halldór: dude, you are in 1st place Diego11: ok i flaged for 2nd fighting for 2nd and he still attaced me and the othere guy. Compleet idiot.

he flagged to me, then he wanted a truce, then he thought it was a good idea to attack me and give me 4th??? utter retard, possible pga with sandact

biggest asshole ever, truces you and attacks you right away cocksucker