Easiest evidence against the Flat Earth Theory I've come up with and an easy one to explain to the passengers:

When we're south of the Equator on a layover and go outside, the constellations in the sky appear Upside-Down to what we normally see here in the US.

Then again, I would be surprised if these flat earthers knew what a constellation was. :(

Show you care, let her manage your money.

Having just read Dan Brown's work, bravo. :D

If you pass through Parma, just outside of Cleveland, you will find that you pass through a time warp into the 80's.

You completely miss the point and it seems deliberate so you can stand on whatever self righteousness you think you have. Either that or youre just dense.

Seriously.

I'm sure if it had been a pic of a white politician @thevagabond wouldn't have assume the poster was a person of color and called them out for racism also.

I think it's self righteousness and dense both.

"Arguing with an idiot is like playing chess with a pidgeon. It'll just knock over all the pieces, sh!t on the board, and strut around like it won anyway."

Didn't they say that about Barry?

Well this sure went downhill fast.

How about getting back on track. I was taught in chemtrail training that the flatness of the earth makes it easier to calculate your path over population centers. Weren't the rest of you?