Yeah, I was thinking a similar thought, Alex. I mean, if you want to "off yourself," well, by all means, go ahead. I don't encourage it - I've been left behind by someone that did it, but, it's not my choice, it's the ultimate "personal decision."
BUT, if you're going to do it, I can think of a list of better ways to accomplish your goal then to tie some cement to your foot and jump in water so you slowly drown. Jeezus.
However, as to the point of the website, he does make a tasty looking corpse. Thankfully, "freshly" found, so he wasn't yet bloated.