Hmmm.... interesting thread. I can't help but think the OP was questioning the lengths some will go to to save on a usually expensive vacation. To each his own - follow the general guidelines, don't exploit the rules, and don't offend anyone if you can help it.
Frugality and greed are two different things.We can't know, when we observe the burger-sharers, fixin's-heapers, stroller-swappers, what motivates folks. IMHO, it's none of my darned business. I've only been truly "offended" when I see kids verbally and physically abused in the parks. But that's me.
Not sure if the OP actually SAW these things or has read them on these boards. What people DO and what they post can sometimes vary! Some of the stuff I read here shocks me, but in all honesty, I have never been "shocked" at anything I've seen in the parks. I try to keep that judgemental part of myself under control;

after all, I'm on vacation in the Happiest Place on Earth! Live and Let Live!
And if guests do things that obviously exploit policy and procedure,over time, everyone suffers in the long run, because some magical perks are eventually removed.
Sanctus - you are NOT less "mouse-worthy"!!! Take all of this with a grain of salt, and I hope you get to go to WDW according to your plan.
BTW,The "soak a diaper with spilled soda" trick was a tongue-in-cheek suggestion put forth in one of the
Unofficial Guides to WDW to offer a stroller identification tip.
If you have ever tried to find "your" stroller in a sea of others after a show, you've been there!!