Police were called to Davenant School, in Loughton, after the man was seen entering the school grounds after he was 'acting unusually' in a nearby park.
Martin Peagram, of Loughton, 33, pleaded guilty to violent disorder outside the Bell Hotel on July 27, at an earlier hearing at Chelmsford Magistrates Court.
Jimmy Hillard, of Loughton, Essex, went to the demonstration at the Bell Hotel in Epping on Friday, a hearing at Chelmsford Magistrates' Court was told on Monday.