Since it was broached in the post-game thread this week, I thought this might deserve its own thread. I would be in favor of replay being used after the fact to watch for dives and violent fouls not seen by the ref. Punishments could run from warnings, to fines, to yellow cards or suspensions. Most broadcasts show dives and hidden fouls for what they are, and if FIFA and/or MLS want to put a stop to it, this would be the way. We're already using it for disciplinary reasons, this would not add much to that.
No on instant replay outside of validating goal line technology. retroactive cards and discipline are fine with me. If any replay is involved, have it done off the field with no interruption of play, then radio any necessary action to the central ref