I think it is best in this sort of situation to stick to things that the Council, the Planners, and the local people may not know, to point out that the community will get no benefit whatsoever, and will have their doors knocked more frequently by what are really "Chuggers". (Charity Muggers).
Long letters about doctrine are a waste of time, a succinct exposition of the paedophile problem would be alright, but again too much detail takes away from the main point which is that WT have no proper programme to protect the vulnerable in their midst, or the Public that get called on.
Short sweet, and not libellous is the order of the day.