Those who failed to vote and suffering the consequences will have to look at themselves and their peers for sure, but that doesn't excuse a generation of people betraying others future based largely on a pack of lies and bigotry, some genuine arguments but in my experience they are very much in the minority, or perhaps just not as vocal.
Public disorder is a relative term, and could be expanded to mean a whole host of various situations, sensible to have contingencies.
As stated, as ignored by you, and as stated by others, the forces will also be mosty involved in the logistical shortfalls created by this utter lunacy that is brexit