I hate to say it but we have had a problem with certain conventioners in September of '06. They were drunk, loud, disorderly, and did some on site damage that we saw firsthand.
Coranado Springs is still our favorite resort, we even prefer it to The Grand Floridian but of the four times we have stayed there, we did have issues one time. I wouldn't let that stop you from going because we had a bad experience but we were definitely surprised that it was happening to begin with and then just kind of seemed to be tolerated, (it only got better after thier convention was over).