For the FTer's who wrote regarding the emergency factors in an airplane would be hampered, due to the number of disabled people on board, is NOT justification to boot them off after being boarded! There are laws that cover such travesties of discriminatory behavior, and folks who are "abled body" should read the rules regulating those of us who not as fortunate as the "abled body"; we truly hope you never have to see the day when you are in some way incapacitated, and the laws then will have to protect you! he following is a partial explanation of the rules for "non-abled body", to wit:

§ 382.1 Purpose.
The purpose of this part is to implement the Air Carrier Access Act of 1986 (49 U.S.C. 41705), which provides that no air carrier may discriminate against any otherwise qualified individual with a disability, by reason of such disability, in the provision of air transportation.

§ 382.3 Applicability.
(a) Except as provided in this section, this part applies to all air carriers providing air transportation.

§ 382.7 General prohibition of discrimination.
(a) A carrier shall not, directly or through contractual, licensing, or other
arrangements:
(1) Discriminate against any otherwise qualified individual with a disability, by
reason of such disability, in the provision of air transportation;
(2) Require a person with a disability to accept special services (including, but not limited to, preboarding) not requested by the passenger;
(3) Exclude a qualified individual with a disability from or deny the person the
benefit of any air transportation or related services that are available to other persons, even if there are separate or different services available for persons with a disability except when specifically permitted by another section of this part; or,
(4) Take any action adverse to an individual because of the individual’s assertion, on his or her own behalf or through or behalf of others, of rights protected by this part or the Air Carrier Access Act.

§ 382.31 Refusal of transportation.
(a) Unless specifically permitted by a provision of this part, a carrier shall not
refuse to provide transportation to a qualified individual with a disability on the basis of his or her disability.
(b) A carrier shall not refuse to provide transportation to a qualified individual with a disability solely because the person’s disability results in appearance or
involuntary behavior that may offend, annoy, or inconvenience crewmembers or other passengers.
(c) A carrier shall not refuse to provide transportation to qualified individuals with a disability by limiting the number of such persons who are permitted to travel on a given flight.