There is one glaring exception, not relevant this season thankfully. If you are fortunate enough to get a decent view ticket (rare as rocking horse doo doos) then you should indeed guard it with vigour and passion at the dire Loftus Road.
From the past few seasons experience in particular, final seating position depends on nothing more than how long you decide to spend in the local bar or ground bar, sod all to do with vocal amplitude. And so it should.