Your are not stating a legitimate fact - but rather your opinion - there is a difference. The problem is not with the Gjallarhorn or any other weapon in the game. The problem is the actual people making the LFG posts REQUIRING Gjallarhorn for certain activities. No where in the game has Bungie made it a hard and fast requirement that in order to partake in a selected activity that you must have a specific weapon in order to complete it. If you are put off by these requests - either ignore them or create your own LFG posting with YOUR requirements.