My own Report on this topic.
Yep, I will give you a vote on this one, I see far to many old posts, if we don't delete the old posts it will start to get confused in the data information given out, with the newer types of alpha/beta etc. and this could end up being bad for Ask-Ubuntu.
If say you are new to Ubuntu and get mixed up with the older knowledge out there.. it could even end up being very damaging to the users computer systems! By reading misleading information with the old Alpha/Beta.
A could be fix.
Maybe there should be somewhere and some way that the old posts can be archived and saved if needed, so if someone wanted to find out something about an older system problem etc.
They could go back to the archive and have a look there for the best answer for there problem.