I think
@Tom 's outlook is closest to my own when it comes to the interactive features in the queue: wait a short while, but if they're fully engrossed in what they're doing and there's a very large gap in the line, then I'll probably pass them.
There's one other aspect of the argument that hasn't been brought up: physical queue capacity. Yes, if someone stops in one spot for 10 minutes and then continues on and catches up to the queue at some point before ride load or FP Merge the overall wait time hasn't been changed.
But during that 10 minutes what's been happening *behind* you in the queue? Depending on the ride, 10 minutes' worth of people can be a significant number. Eventually the queue will fill up and spill over outside the regular queue, at which point a CM has to put overflow queue procedures into place. While a single backup caused by one stopped person isn't likely to cause a large backup, multiple small backups have the same overall effect. A minute or two of empty queue here, a minute or two there, and suddenly you have a combined 15 minutes of empty queue space spread out throughout the queue. That's physical space that has to be accounted for somewhere in the queue layout...
A similar "combined delays" issue happens with the ride system at Space Mountain: The rockets are meant to be in constant circulation. There's only a limited amount of parking space behind the Unload point to hold rockets before they backup into the ride space and the ride cascades to an e-stop because there isn't enough room to park them all. It doesn't have to be a single rocket stopped for a minute or two, it can be small delays of a few rockets sitting at Unload 15-20 second too long, the delays start to pile on top of each other and then *boom* you have a cascade stop with no single stopped rocket to blame.
There's a reason many amusement and theme parks specifically have signs and verbal requests to keep up with the party in front of you. (Though I'm not sure if Disney specifically has such requests) It's about queue capacity.
-Rob