I think
Wandering Archaic is a good example of politics done right. Players may choose to pay the cost to avoid its effect, but you can promise them that you will copy their spells and choose non-allied targets. If they accept, you can do exactly that or outright betray them. In one case, I copied two
exile spells and betrayed the caster.
Funny story: I made an agreement with a player to attack me and draw cards from blocking with
Flumph. After I declared it blocking, he cast something like
Tread Upon to try killing the
Flumph. Not only did he not get the card draw, but I copied it with
Wandering Archaic to save my
Flumph.