I think that the belief in the profitability of l/r in PKOs is an instance of duration neglect as well as the fading affect bias. L/r only makes sense at the start of the session, in order to reduce the total session length, but then again, it hurts the ROI and thus increases the probability of a big downswing, so use it with caution and definitely not at the top end of your stake range.
Has any of the MTT regs (I'm not one) actually analysed (via observation) a lobby of a large PKO (or a batch of medium-sized PKOs) to count objectively what fraction of players with big bounties on their heads actually have a smaller stack than the starting one? Intuitively, I don't believe it's big enough to compensate for the inconvenience of being covered by the majority of opponents when you register late. There are a couple of reasons for that:
1. Getting a big bounty on your head involves knocking out players and thus gaining chips in the process, so having a bigger bounty than average on your head is positively correlated with having a bigger stack than average (ldo). Correlation doesn't imply causation, and of course there are statistical outliers - those who first knock out a few players and then lose a big pot and become shortstacked - but here we come to point 2.
2. When a player is covered by the majority but has an unusually big bounty on himself, the opponents play wider ranges and are more likely to stack off with him faster (ldo). So, when such a player is present, he'll either be eliminated fast or will double / triple up fast and no longer be shortstacked. In other words, the presence of such players measured in man-hours is usually low, especially as opposed to the occupancy of the tables by players with bigger stacks than the starting one (measured also in man-hours), and the gap between the two usually grows as the tourney progresses. Also, the pots involving short stacks with big bounties on them tend to be more multiway, thus you'll often have to expose your stack to 1 or more opponents covering you if you want to knock the short stack out.
The reason why shortstacks with big bounties on them seem omnipresent is that knocking such a player out is a big pleasure, it's much more emotionally charged than the mundane event of being knocked out yourself, and such intense emotions are imprinted deeply into the memory.