People acknowledging its not a good game but still buying it...you do know you're part of the problem, right?
Kinda same with people who are buying it just for MWR. I mean, I know you want MWR, but this is sending the wrong message in the area where it counts the most: sales. So, if it works, and IW sells a ton even if it's rated poorly by critics and shooter fans, will mean Activision will know how to manipulate gamers.
Re-release MW2 with anything they're not confident about, and it'll do well. Sound marketing strategy if ever. Just saying that "vote with your wallet" thing should apply to games that deserve it.
But yeah, people are definitely free to do what they want to do and such. But don't be surprised if Acti does it again next time -- least of all, don't complain if MW2R is tucked away again.