I think its the matter of knowing something is not what IT SAYS it is, and ignoring what the actuality of it IS. You know that something isnt right but you pretend like it is right. You see things, you hear things that dont sound right, but you ignore that little voice in you. Some honestly dont know. People have to find out things on their own.
With that being said, there are some more elderly witnesses (born before 1950) who honestly DONT KNOW. But I would say, for the people born at the tail end of the baby boomers, and generation X witnesses and up (born after 1965 and beyond) I know they have access to the internet, and they can easily find out certain information without the help of the towers. Like I said, all the matter of them not wanting to know when the proof is all around them. Just reading the whole 'overlapping generation' thing has given me proof that something is not right.