I like the reasoning for keeping all NL posts in one forum. The elitist machismo attitude that is prevalent at other forums is something to be wary of.
A clear posting guideline to put stakes and FR/SH in the title would be sufficient in my opinion. If a new poster doesn't follow the guideline I am sure a friendly (standardised) PM from a mod and a quick edit of the post will work.
However I slightly disagree with Excession that this would 'especially' apply to new posters. In order for it to work I think it needs to be applied consistently and 'especially' by forum regulars. If all the regulars were to post in a standardised manner (for example "$100 FR - AA on a monotone flop" OR "0.5/1 FR - AA on a monotone flop") I am sure newer posters would follow suit.
As a positive side effect it would also make the forum look all structured and nice.