There have been many times that I have felt like a tip was required because someone in housekeeping went above and beyond. I feel a bit like Dean though. If it's not a tipped position, then it seems wrong to leave a tip for the housekeepers and not for the ride operator etc.
I do know that many hotel chains prefer that housekeepers NOT be tipped. The reason is that if some feel it encourages housekeepers to "take" things that don't belong to them. Many housekeepers are specifically told NOT to take money in any form (tips included) from the rooms.
I prefer to offer a tip if I ask for something special above and beyond what is normally provided. BUT...One time at OKW when I had to call THREE times to get the old soap left from the previous occupant removed and the shower cleaned, I was wising I could have had a reverse tip! FYI, I never did succeed in getting that done, so I did it myself, but I did make the call 3 times because I wanted someone to understand what had NOT been done.
When we first joined
DVC 17+ years ago, housekeeping was very good. You could eat off the floors! In March at OKW, I kept sticking to the floor in the kitchen, so I tried to get out the steam mop to do the floor.....no mop head. I took a bath mat and rigged it up as a mop head and steamed the floor, only to end up tuning the bath mat BLACK! This was right after we moved in. I took pictures and sent them on, but never heard a thing. At the end of that trip, I did leave a "tip" for mousekeeping. It was in an envelope marked "tip" and inside I enumerated my tips:
1. Steam the floor, that's what the mop is there for.
2. Leave the steam mop pad so that if #1 wasn't done, the guest can use it.
3. If I did my job the way you did yours, I'd be unemployed.
I know it was snarky, but I was just apalled at how dirty our 1 bedroom was, and not at all happy about having to do all the cleaning when we arrived. FYI, I am not a germaphobe, but it should be generally clean and not offensive.