Oh, this is one HUGE subject for me. I work at Sears, in the Lands' End department, and I'll tell you right now, it's INSANE!
Everything I'm telling you here now is from personal experience, just so you know.
The fact is,
even though I can't spring for Kohl's employees when it comes to checking fitting rooms, I can sympathize with them A WHOLE lot. You see, you can have 100 people try on things in the fitting rooms, and they all put clothes back on hangers and place them on the racks. Heck, you may even get people that put it back where it originally came from! (a real treat in retail

) However, even though those 100 people are great and considerate for being neat in the fitting room, all it takes it ONE person, who doesn't care what happens to the reject clothes, to mess up the fitting room. Unfortunately, more than the ratio I mentioned do this, and it can get VERY annoying, especially when we have enough to do at work.
The worst part is when, after we clean the fitting room, no sooner than about 10 minutes, we'll check in on it, and BOOM.....it's like a tornado came through and trashed it. It'll look like we had never checked it in the first place, and if the wrong higher-up sees it at the wrong time, it'll make us look bad. This is partly why it's so annoying for us. People will take in CARTFULLS of clothing at a time, try it on, leave it inside out, off the hangers, and with the tags torn off, and just leave them there, as if it's a chore to put them back. The funny thing is, I will bet you that most of the people that are messy in fitting rooms, are in fact nice and neat at home. Their mindset usually is
"Hey, it's not my house, it's not my stuff! I don't have to clean it up, that's what the associates are here for. I'll just leave this here and let them get it."
I'm not complaining that we are cleaning the fitting rooms, because that IS part of our job. I get that, I really do. The problem is that people are getting TOO carried away with the fact that we can put stuff away. It gets to the point that we sometimes have to turn customers away because we have to clean the fitting rooms before other customers start to complain. Half the time we're practically doing the job of janitors, cleaning up after people's mess! (including half-eaten food, drink cups, and and used tissues)
The weekends are the worst, because that's when all the messiest of the 'messies' come out and unleash their wrath.
One horror story I have will let you know how bad some employees have it: Last year, same time as now actually, I was checking the fitting rooms as per usual. A lady walks out of the last fitting room at the end and has one bathing suit in her hand, and she smiles and goes "Well, it took me a while, but I got the bathing suit I needed for my trip!" and I congratulate her for finding one. (as we all know can be a difficult task! lol) I get to the last fitting room, open the door, and I actually stood there motionless for a minute or so. This lady had tried on literally EVERY SINGLE BATHING SUIT we had in stock (remember this is Lands' End), each one in 3 different sizes, all inside out, off the hangers, tags torn off and flung everywhere, and they all had deodorant stains on them. Overall, I think there were over $2,000 in bathing suits there, in a huge mound of clothing-rejects, staring at me with beady little eyes and going
"help me!" 
I almost didn't want to touch it. It took 2 carts to get them all out of the fitting room, and a full hour to put them all back. All this for one bathing suit she ended up buying.
Nowadays, there are 'incidents' every so often, but never as bad as that day.
Men don't do it nearly as bad as women do, to be honest. Although, that might be because they don't try on nearly as many things, and they tend to be satisfied if something fits, period. They aren't as paranoid as us girls as to if it looks perfect or if it flows nicely. In fact, in the course of a day, we may only need to check the men's fitting room 3-4 times, and only find 1-2 things overall each time.
I just wanna ask all the women that leave clothes on the floor (by 'on the floor' as in just thrown everywhere, not folded nicely like jlewisinsyr does.

)
"Is it THAT horrible to just put the clothes on the rack provided? I mean c'mon, that's what it's there for!" 