Yeah, this was an interesting read or I guess re-read. But, count me in the group that is very selective concerning scavenger play. On paper, sure it looks good. Free EV. Lot's of things look good on paper, but....
Scavenger plays are something that gets noticed. Nothing illegal, and you can argue that non-AP's engage in this regularly, so there is some degree of commonality, but I can assure you that anytime players are exchanging money and reaching over one another to make bets....it is being watched. THAT is their job!
As a player who's primary objective remains longevity and particularly a player playing mostly a rotation of regular games, I try to avoid anything that draws extra attention and scrutiny.
Now that said, every situation is different. I weigh each situation in terms of risk reward. Completing someone double or split of $25, even a strong double like 11 vs 6, just isn't worth the risk for me. But you can be sure if the guy down the end betting $1000 a hand allows for that same opportunity, I am all over it....even if the amount is larger than I am playing. The reward is worth the risk. I will accept the extra attention drawn, scoop up the EV and hopefully win and back myself off that location for a little while.