It is very possible that stuff like Bigfoot and Loch Ness exist. People used to think that Mountain Gorilla's never existed, until they were discovered in the early 1900's. We are discovering new species and species thought to be extinct everyday. Who's to say one day Bigfoot won't be scientifically proven real?
I did believe in these things at one time, but after a while, I started thinking about how idiotic most of it is, especially ghosts. I especially hate all of these pathetic television shows that have the same plot: "What was that?!" "OMG! Its a monster footprint! Lets chase it!" "AHH! WHAT WAS THAT?!?!?!?!?!" End. Same with ghost hunting shows.
I have heard of people experiencing these things. I do not believe it. There is no way to prove that it actually happened. So, without pure evidence, it is pure BS. 😉