Bish do tend to win more maps than the other teams, and we had a run of something like 10 out of 13 maps starting a few maps ago going back. So I totally get it why bish should be targeted, we're the biggest threat to a map loss (from a purely tactical standpoint).
Human nature is to beat up on the weaker people, unfortunately, so when one side is being rolled, especially when it is the typically stronger side, the other tends to join in. Some players (<S> to you) are looking for adrenaline and action and don't care who wins, but more just want to thump their chests in triumph, even if the victory was a cheap one. That won't ever change, so why not use it to try to fix the problem?
Upping the perk point award from the measly 25 to 50 or 75 might induce more competitive game play. Would harness the self-serving attitudes of many players toward a more competitive direction, since they'd get more out of a map win?