I think the fact that there is a need of a "singing section" it is not indicitive of how we are losing our atmosphere. More that with smaller crowds and all seater stadiums it's more difficult to get like minded people all in the same place. In the good old days if you fancied a sing song you headed to the back of the kop or the end pen in the lowfields and were guaranteed a good atmosphere. If some folk want to try and organise something, well good on em.
Beats fans falling out with each other because some want to sit and watch the match whilst others want to sing to their hearts content.