This is accurate:
http://websleuths.com/forums/showthread.php?t=196380&page=26
Prior to cancelling the search, there were no articles instructing the community not to search.
It would be quite odd for the sheriff's dept. to outwardly state, either during a media interview or otherwise, "Hold up, folks. The phone's ringing off the hook. Sorry guys, you can't search. Too many phone calls coming in complaining about it."
Lt. Cobb was well aware of the search prior to it being even organized.
In my opinion, public searches should have begun right away, and should have continued all along. A huge window of opportunity was missed, IMO.