I've talked to a couple of people who are almost downright hostile when it comes to slackpacking and I don't get it.
Man I love catching a ride 20-25 miles up the trail and hiking back to the hostel or wherever with a daypack full of snacks. I can move quick, my back doesn't hurt and not carrying a pack I'm about 1000 more times to take a blue blaze and check out a view or sight.
Also that's a section you don't have to hike wearing a pack and you can start hiking further up the trail too - that's like an added bonus.
Why do some hikers look down on slackpacking? Are they just stupid or are they jealous?