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"Mrs Bloggs 'At Home' Etiquette/Protocols" it was NOT deleted as you wrongly assume. It received its last post on 6th Jan 2011. After that, when all the steam has dissipated, it left the forum and now lies 'asleep' many pages down in the abyss of PPRuNe's archives. That can happen even after ONE day on the front page. Such is the turnover of threads in making way for others.
500N is not saying that the Mrs Bloggs thead was deleted, quite the opposite
No problem with your decisions but what is the difference between the "Tipsy & Wurz" thread - which was just a written version of what goes on in Officer's Mess's / Dining in nights anyway - and the thread "Mrs Bloggs 'At Home' Etiquette/Protocols" which was one of the best threads on PPRuNe.