It's probably a bit strange for new people coming onto a forum where people are reminiscing about strange ex posters from eons ago all the time. Also dropping codes and words that won't mean anything to new people is going to make them feel excluded.
Sometimes people need these types of things to help them feel part of a group and will drop phrases, old posters names, hidden meanings into lots of posts to show that they are 'in the know'.
This is how It seems to me, I try not to use any of the '4,lav,JF,snurk, parp.....' because I don't want to be seen to be trying to fit in, if that makes any sense - I'll just stick to looking for holidays 