As for the ties, I do not just believe that people will pay for them, people do:
http://www.zazzle.com/collector+ties
So if even my - according to you - idiotic ideas have found traction in the meantime maybe there is something there ;)
The score with 'ideas' is about the same as with start-ups, most of them tank. The problem is that if you wouldn't have the bad ones you wouldn't have the good ones either.
And if you could muster the energy to read on for a bit you might find some that are not like that, or maybe you would think they're all junk.