I myself do not have a problem when someone comes on here and asks if they have ever received some pixie dust at check in, nor does it bother me when they ask whether they have a better chance or not by checking in online. Most of the time the person is not expecting an upgrade nor would be disappointed in not getting one but gets flamed big time. Let's be honest here, how many of us would complain about an unsolicited upgrade upon check in. I highly doubt anyone here would say, "I'm sorry I will have to kindly decline on receiving a concierge TPV room since I only paid for a standard room with a standard view, give it to the person behind me instead." I myself received an upgrade to concierge the first time we visited WDW back in 2008 and had no idea... To this date it is the only upgrade I have ever received... I don't expect one, I don't ask for one, and I'm not disappointed to not receive one. I'm content on getting what I paid for... My hunch is most who ask on here are also content and don't ask, they just want to increase their chances... I'm OK with that and will not flame a single person who wants to come on here and ask about some "Pixie Dust."
Now can you imagine if someone were to come on here and not only ask about getting a free room upgrade, but also had the nerve to mention about towel animals as well.