It really is dead simple. If you don't want posts to be deleted keep them relevant and civil. Some will slip through the net as the moderators can only do so much but not 'thousands' as stated. Other posts that may be deleted are those discussiong moderation policy or those posted to simply cause trouble.

I keep posting this link but it feels like I am banging my head against a brick wall. It is worth reading.

Etiquette & Advice