Just in case it's not clear from the link/comments, the "jamming" happened at one convention location (Gaylord Opryland Hotel and Convention Center in Nashville

Just in case it's not clear from the link/comments, the "jamming" happened at one convention location (Gaylord Opryland Hotel and Convention Center in Nashville, Tennessee). It seems that the convention center was blocking mobile hotspots in an effort to control the Wi-Fi traffic in the center, possibly so that they could charge for their in-house Wi-Fi. This doesn't seem to have been a widespread issue or an issue for hotel guests. However, I suspect that this is a common practice among convention centers and that the main point of this action by the FCC was to put everyone on notice that this is not acceptable behavior.