There's a motivation issue for players here though too. We are 'supporters' are we not? To a team that's already trying to rally having gone down to an unfortunate goal (or fortunate, depending on your perspective), what do you think seeing queues of people at the exits does for your drive to get back into the game? Admittedly our support isn't anywhere near as bad as some in this respect, but I always find myself asking myself asking the question what must they hear when someone asks them who they 'support'. Who do they follow would be a fairer question to answer with EFC at that stage.
Jags himself said it in his post-match interview, after the equaliser went in, the crowd more or less sucked the winner into the net. If more people felt it was prudent to leave at this stage of a game, that effect (even if purely psychological for the players) would be diminished in line with the proportion of people who leave.
I can appreciate people need to get home etc, but trust me, it's no less of pain in the derriere sitting in the 2 mile queue for the Wallasey tunnel on Scotty Road (or whichever particular queue you're in) when you've witnessed a result like that last night than it is when you've been hoofed. Either way, many fellow road users are going to get the bird (read middle finger or other half, I used alternately at will, both equally degrading) and you're still gonna hornblast the feck out of whoever believes they have free reign to jump the queue in their X3!