Why would a vandal make easily reversible damage to a yard sign, by wrapping it in what seems to be a sheet of butcher paper ? Around here, people will steal the sign, or set it on fire.
Also - look at the work -
Its held together by at least two dozen staples. What vandal has the time to uproot a sign, staple butcher paper to both sides of it, write a new message on the paper, and plant it without being noticed by anybody ?