I have heard nothing credible about this at all (and for those who know my post history can testify that I may know a thing or two about upcoming procedure changes at the parks
).
I do know that security was looked at regarding possible attacks on property (in fact there was a false bomb scare in the utilidoors about 2 weeks ago I bet very few of you knew about), and as of yet...nothing has been slated to change. I can say this, they are more concerned over "vigilante" guests sneaking weapons into the parks "just in case" than they are of a terrorist group.
Some of you have already put it into perspective...the resort is HUGE. It would be impossible to monitor it all. Even now the bag checks are more of a formality "peace of mind" action, as its been shown they don't really work well. They are aware of that. They are also aware that if someone wants to attack them badly enough, they will. Its not a matter of being cheap, its a matter of maintaining a good balance of guest experience and showing they are "trying".