It is truly sad that someone has been made to feel so upset that they feel that this is an appropriate way to express their rage who ever it is. However victimising elderly women living alone is not acceptable. If the elders wish to keep it within the hall then they should offer CCTV to the elderly ones being targeted so they can determine who exactly is doing the damage.
It is easy to assume that it is someone who has been Df'd but it does not necessarily mean it is so. It is so easy for witnesses to believe someone who rejects the organisation also rejects any moral compass. There are many people with an axe to grind not just those abused by this organisation.