Matthew Poole and continuators on Acts 19:40

40 For we are in danger to be called in question for this days uprore, there being no cause whereby we may give an account of this concourse.

He wisely minds them of their danger: For being under the power of the Romans, it was no less than the loss of their Liberties to abet any Faction or Sedition; And to make a concourse or meeting tumultuously together, was capital, unless it were upon the sudden invasion of an Enemy, or to put out some raging fire.