Should plus-size passengers get a free seat on the plane?

If obesity is a disability shouldn't airlines offer a second seat at no extra cost?

Illustration by Christopher Elliott

On a recent flight from Phoenix to London, Gerri Hether found herself seated next to an overweight passenger — so overweight that he couldn’t fit into his seat. 

“His fat rolls flowed over the armrest into my seat and onto me,” says Hether, a retired nurse from Mesa, Ariz. “I don’t know how he even managed to get into t…