Apparently some people seem to think it's cruel/not okay. Whoops! DH always carries DS facing out in our Infantino because we didn't know any better! Do you carry your baby facing out? Mine seems to enjoy it a lot!
(Among other reasons, because it's bad for the baby's back/leg/hip developments, and the wearer's posture suffers).
http://www.bobafamily.com/blog/2011/10/11/nine-reasons-not-to-carry-your-baby-facing-out/
http://theecofriendlyfamily.com/2012/02/babywearing-why-forward-facing-isnt-for-you/
http://www.becomingmamas.com/why-you-should-avoid-crotch-dangler-baby-carriers/
http://betterbabywearing.blogspot.com/2012/02/why-i-dont-like-forward-facing-carriers.html
http://www.continuum-concept.org/reading/spinalStress.html
(Please note, I'm too lazy to look for hard evidence about this. The above are not scientific articles.)