Give the ability to post issues only to members who have a (forum) account that is older than 1 month.
Perhaps allow new members only to vote.
The truth is that tracker is being flooded with extremely important and adequate issues like "civilians can buy lasers that allow them to set people on fire so why don't we have them in ArmA?", "The word 'war' on a loading screen caused me a deep psychological trauma" and "make grenades explode trees for immershunz" en masse - which in turn covers the actual important issues which usually have only 1 ticket per each and as a result are hard to find.
It appears that a lot of new people have no idea what game they are buying and giving them one month to get familiar with it will ensure that even if the tracker won't be pure - it will be much cleaner.