Never!
And Yoshies have long tongues because it helps them to get food. Yoshies in the past may have had normal tongues, but they would have grown longer over many decades to help the Yoshies survive in their natural habitat of Yoshi's Island.
Actually, they don't. It's revealed in the PM series that they tend to blow themselves up, not only as an attack, but when they're angry and sometimes for fun.
If Mario was born in the Mushroom World, then how and why did he get to Earth?
True, it probably is an organization.
I just checked, though, and it's not on the List of Implied Organizations, either.
--EDIT--
I played through the rest of the stages, reading all their signs, and I came up with this:
Luigi Tires (Luigi Circuit)
Star Travel (Mushroom Bridge)
Koopa Kart...
So earlier today, I was playing Mario Kart: Double Dash, and while playing Time Trial on Yoshi Circuit, I felt like reading the ads on the side of the road, and one of them says "Luigi Oil". I was curious as to what it was, so I searched it on the Wiki. However, it seems that we've yet to add...
Actually, in MarioKart: Double Dash there are signs that says "Luigi Oil" and "Waluigi Oil". Those are probably the fuel of Mario Karts, although it's possible they could contain mushrooms.
He gets Peach to bake him cakes. ._.
On the page on the wiki, it says there will be a Chain Chomp partner, and it follows to say: "A clip of gameplay footage has shown this Chain Chomp being thrown by its chain in the overworld". So the current screenshots showing Mario alone are either going to be changed to have his partners or...