To those concerned about censorship.
About twice a year, since I joined PPRuNe in April 1997, either Danny or Rob have explained why posts on threads such as this get deleted, if a post is frivolous, repetitive, asks questions already answered, makes statements that clearly show the poster hasn't bothered to read the previous pages, makes really stupid claims, like 'aliens' etc. makes a post that is quite irrelevant, then they will be deleted, as they contribute nothing to the discussion and take up unnecessary space. It isn't 'censorship', as some suggest, it is good house keeping and goes some way towards reducing the amount of fatuous 'glue' that the aviation professionals here have to wade through.