Ration supplies in a free market economy . Watch out for trigger effects or threshold effects that get large numbers moving as a crowd. Need serious thinking about early warning on these. This is the way to manage power in any area. It is important to report these management actions with info on when they will be corrected and also rotate losses of power if they are necessary.
Economic opportunists needs further clarification.
There will obviously be opportunists who benefit from Y2K but nothing can or should be done about that. On there other hand, there are those who will take advantage of Y2K to commit illegal acts such as money laundering, transferring money from banks, etc. It is those activities that must be quickly curtailed and system integrity restored. Speaking as a guy who is in the process of buying a house in Fairfax County, VA, I could name some candidates. Maintaining the connection may result in damage to equipment and delay restoration.