Allright, even though I voted yes, let me play devil's advocate for just a minute to argue my case:
Garnet, you make a great point. I agree with you that we have made great leaps and bounds in the marine research field of study, thanks to advances in technology. You are absolutely correct on this!
Where I do not agree on is the amount of exploration that has been conducted in our own backyards, or in this case, the forests and mountains of our world. There are millions of untouched pristine acres of woodlands and montainous areas that would be an ideal living space for any animal, even for something as big as Bigfoot. These spaces are so big and wide, that I would venture to say that at least half of these places have never been explored thoroughly.
If I were to go one step further, let's take on religion, specifically GOD. No one ever met GOD, but we all know that he exists. He was our original creator, starting with Adam and Eve. He created the earth, heavens, oceans, man, etc... but we cannot see, feel, or touch him, but he's "there". So therefore, it is widely accepted that he does exist.
Now with Bigfoot, on the other hand, there is physical evidence to his existence. Like both ajwiggz and Shogun mentioned, there's the infamous video that has been held as inconclusive, then we have the footprints with the primate type ridge patters but with a human type foot. There's hair samples, people's sightings, etc... All these things point to the possibility that Bigfoot does indeed exist somewhere out there.
In conclusion, it is still my belief that the possibility that Bigfoot does indeed exist is still plausible. I, for one, cannot toss aside the mounting evidence for his existence. Let's just say that it's "faith" that tells me that he just might be out there somewhere smiling at the thought of us having this discussion.
And Bigfoot, if your reading these forums, well, it's so easy, that even Bigfoot can do it!
