I am assuming you are referring to security. While I have not been on a
Disney Cruise since 9/11, I have been on other lines. I believe the security is great. In some ways, it is more efficient and tight than the Airports. All bags scanned and/or searched. Armed soldiers at all ports. No boarding pass, no entry plus you must show a seperate picture id each time you board.
Key West was the only port that had a slow boarding line, but most people were very nice about it.