I don't Pre game alliance with anyone but I do do in game tactic truces where I won't say anything and just make an obvious move and hope that the other player is reading the table well..
95% of the time I will be a kind and generous player. 5% of the time, I have played too much that day and am frustrated from a previous game and take it out on the next game instead of shutting down the page :P
Flags are all dependent on the game situation. If there is a review on here saying "he doesn't respect flags", it's safe to assume that that player was upset for being in a non flagging position or I made the simple judgement that they didn't deserve the game.
I will like to say that I used to judge what happens when I am first but I learnt that lesson after a Revolt on me :P
I am now happy to roll for first or just give my position away. I don't play for points but I do play for the best position available