Leandro Negre to ask questions about hockey's experience. Turns out that hockey never looked back: the scoring went up, the mid field became less crowded and the number of highly contested (and also incorrect) referee decisions went down.

Blatter is considering abolishing the offside rule in football as well.
Of course, rules in sports are constantly being changed, in football too. The experience of hockey must be encouraging.
Will the scoring go up in football? For sure. 99% of disallowed goals are because the scorer was in an offside position.
Will the mid field become less crowded and more open? Logically - forwards who will be less afraid to be caught offside will advance closer to the goal. Defenders will have to follow the forwards. Hockey's experience also points in that direction.
Most importantly - many of referees' crucial mistakes that are "ruining" games are involving a controversial offside call. These will be eliminated.
In short: objectively, the game will probably become more enjoyable and more fair.

So should the offside rule be abolished? No way.
Football is so rich in history, so important and so widely recognized that the offside rule is not to be considered as an arbitrary man made decision. In a sense, it is closer to an axiom of mathematics, not proved and not discovered. It simply is.
I hope Sepp Blatter knows that.