kie is right; removing the offside rule would turn the game into a long-ball travesty, with both teams packing the penalty boxes and ignoring the midfield.
It's worth noting...for every dodgy decision against you, there's a decision that goes for you.
I'm not for TV evidence; I think it'd slow down the game to do instant replays, even if just after the goal.
One of the advantages IMO of footie is that after a goal, you have kick-off within minutes and usually the conceding team giving it laldy; I think if you use replays even at that stage, you'd lose that momentum (although use for tech to instantly decide offside / over the line could be useful).
I'm pretty much opposed to the widespread use of TV replays during play because I think they'd spoil the flow.
Oh, and 'almost' started shouting?!

You should see (hear, rather) your average Scottish game.......