It's just a couple of people, well actually one pretending to be two, who is creating most of the bickering.  I tried to engage with them but sadly to no effect, pearls before swine comes to mind. 

As other people have said try and not feed them. Ignore Ignore Ignore.

To be honest,and has been said a million times, it is just as much the fault of the people engaging in the vacuous and futile exchange

Morphing the definition. So Michael Jackson's red jacket or glove isn't memrobilia? Or the Ruby slippers from wizard of Oz?

Whether this is a prop, memorabilia, or an "artwork" it is going to look excellent when displayed.

Artwork can be a prop and/or memorabilia in some cases. I see as this an artwork that was part of a larger art installation, but it still holds even without the rest of the installation. It was interactive art that is very memorable and makes a strong point and the boat is the item that people remember.

If compared with the Hirst Beachball installation, I see the Ball and Knives as props if shown individually and not artworks. I can't say the same for the boat. I do see the cliffs at the back of the exhibit as a prop, but still very important in the overall piece.

Regarding props, They are physically part of something and the time and place so to me they can be as important as artwork. There is something special about an item that people saw, interacted with and remembered years afterwards.

5.1m followers , could raise 10m + gbp?
Most expensive banksy piece yet

Wether it's a prop, work of art or any other label that makes one feel better..... this item is about to raise lots of money for charity. Anyone questioning this, even because they are lonely trolls needs to have a look at themselves.

Above or below 5000 grams?

I think you're still missing the point.  It's not about "admirable gestures", it's about whether it is 'art' or 'memorabilia'.  Your definition of the word 'memorabilia' seems to corroborate what I have been saying, i.e. that this boat thing is a piece of memorabilia not an artwork. In fact, I think Banksy himself would agree with me.  AFAIK this is not signed by Banksy, neither has it been called a piece of art by Banksy.

I remember seeing your comment coach and saying to myself

YOU WON'T HAVE TO WAIT LONG !!!!!!!!!!!!!!

Barely any of his wall pieces are signed.  Are they not considered art? 

He calls the Cinderella piece "art" in this interview.  Why is this different to the Boat piece?

"I’m at a point with art where I only really care if the piece is more than the sum of its parts. I’m lucky because what I make either succeeds or fails. Some people undoubtedly would tell you that’s why it’s crap art, but that’s the way it is. I feel sorry for Abstract Expressionists—how do they know when to go home?

All I need is to make my point and get something more out of it than what I put in. If something extra has happened between the idea and realizing it, that’s a win. This week I surrounded my Cinderella’s carriage with a ring of paparazzi, and the flash bulbs made the shadows leap around the room, and the pumpkin looked like it was lit by flickering candles, so I’m good. I never saw that coming.

My satisfaction level is independent of your opinion. If I feel a piece has worked, there’s nothing you can say that will take that away. And the flip side is, if I know it’s failed, there’s nothing you can say that would make it OK."

www.juxtapoz.com/news/october-2015-banksy-s-dismaland-exclusive-interview/

And more:
"The art market certainly doesn’t encourage creativity. Like most markets it rewards being able to reliably deliver recognisable product on a regular basis. Which isn’t necessarily a recipe for exciting art. I heard someone on the radio, it might even have been Richard Ashcroft, say: “It’s not art unless it has the potential to be a disaster.” Which is why I’ve spent months making distorted fibreglass fairground sculptures to install in a dirty lido miles from anywhere."

www.theguardian.com/artanddesign/2015/aug/21/banksy-dismaland-art-amusements-and-anarchism

Feel free to provide references that back up your view.

What makes you think it is a he? 

Just to be clear, I am not criticising Banksy.  I never have.  I am simply saying that people who think this is a genuine piece of Banksy art are misguided.  Even Banksy himself doesn't refer to it as a piece of Banksy art.
But yes, it's great that it's raising so much money for charity, I agree.

Can anyone tell me if the dimensions include the cubic air or atoms in the boat (and any dust if poss)

thanks