AH! Now you're looking at it from the other side of the coin!
I agree that SUPPLYING the "free" access to others is not for the faint of heart. I've never traveled with a wireless router and honestly I'm not sure what I would do if I did.
Still as a user, if I happen across an unsecured Access Point I may very well make use of it. Whomever is running the AP has apparently overcome their own liability concerns.
Not to resurrect an old thread, but............
Out on the internet, something like an "attack" or whatnot would be recorded by an IP address.
It's extremely, extremely unlikely that the IP address you have when using wi-fi at a Disney resort - wired or wireless - is the same one that the server on the public internet you're connecting to will record. IPs are not free, companies have to buy them in blocks. For this kind of connection, you're going through a big router on Disney's (or Smart City's) end before it gets to the actual internet. That means that if someone traces an IP address back to, say, Smart City, that IP address could be in use by dozens (or hundreds) of different people at once. It would be extremely difficult, probably impossible, to then pick out just who is the actual perpetrator. This is different than your home connection, where are getting a true internet IP address that can be traced back to you via your ISP.
So, that's really not a reason to worry about sharing a connection.
Furthermore, if someone hooks up an unsecured wireless connection, they are, indeed, just asking for others to use it. And why not? There should be little to no difference in speed for them (realistically, it'll be just the same as if you bought it yourself and used the bandwidth that way) and no extra cost for them.
Were I paying for wired access, I might be tempted to bring along a wireless router and set it all for all to use. Mine at home is in use constantly (I run a web site through my cable connection) but they usually cost $20-40, sometimes even cheaper - they're not expensive.
For my upcoming trip, I will see if anyone is doing that within range of my laptop, otherwise I'll just dial in once or twice. It's not worth paying the $10 for me as I don't plan on using it very much, the laptop is mainly there for backing up my photos nightly and burning DVDs of them.