GLT, providing it is absolutely foolproof, would be an acceptable addition to the game. However it is not likely to be affordable / accessible to all (and I'm talking just league clubs here); maintenance etc etc. What will work at Old Trafford will surely be struggling at Underhill, purely on security and finance. What about the FA Cup? Say a Blue Square South (or further down the pyramid) team reach the 3rd round and are at home to, say, Wigan... then what happens? Or some Albanian team reaching the group stage of the Champions League to face Barca, Inter and Bayern when in reality they've not got two beans to rub together. Gets a bit messy!
The offside law is, indeed, an ass! The law itself has not been reworded but the interpretation has changed. I do believe we have Herr Blatter to thank for this, mid-season, a few years ago. It is confusing now and goes against the spirit in which the law is written on many occasions. I have had many a heated discussion with my colleagues on this one... it wasn't broke and it didn't need fixing. Worthy of a separate thread methinks.
As to respect to referees there is enough in the laws to combat the abuse we are likely to face. At professional level it strikes me that players get away with a lot more than they would at Cassiobury Park on a Sunday morning. PGMO's rarely use the means at their disposal, though it must be said most pro players seem to think they are above the law when they don't even know the laws! The trouble is that referees have individual tolerance levels which leads to the inconsistancy that so annoys players and spectators alike. Personally I like the idea that the only person able to speak to the referee is the captain (as in rugby) which is one of the ideas the 'Respect' campaign seeks to introduce. I have my own way of dealing with things on the pitch and I do not recall giving more than 2YC's for dissent in any game, ditto RC's for foul language (aimed at me) and only once do I recall being surrounded by a gaggle of angry players (alas that was understandable as I had, with hindsight, made a howler, if not acceptable in terms of undermining my authority).
Sorry to rabbit on, I've obviously got far too much time on my hands, but they are issues close to my heart - great thread!