I heard that Disney reported this man to the FBI in April for appearing to be scouting out Disney. The only way they could know his name is if he bought something there with a credit card or a ticket. I was actually glad to know they are watching out for this kind of thing because those bag checks are just not going to help much if someone wants to kill people.
I agree with others that we have to live our lives and we cannot obsess about the "what-ifs". Go, enjoy.