Well, I don't confuse real life with a computer game. If a team wants to do this all day long in real life, then the players out there have a lot more time to react to it. In FIFA09 it's a lalalala shoot. So it's not the same thing at all.
Basically people who constantly use the through ball in FIFA are trying to exploit an issue with the game, and that's what makes it lame, and no fun at all to play against.
I'm playing for fun - and if someone is spoiling the fun by doing the same thing over and over and over, then it's my choice to simply not play with them. Personally I think they need to grow up a bit.