Agreed I have taken exactly the same approach, ask them to leave and if won't stand in front of them, only happened once last season so I dont think it's not a major problem, or maybe I just got lucky.
Same situation booked early and in same area as you , their definition of 'best' is not mine. If I'm booking for anything else in a stadium I could expect to choose a seat in an area of my choice, why do football fans get treated differently or more to the point why do we accept this terrible...