[Butch Cassidy Slept Here]

Silent:

The OP was not denied boarding because he wrote "Southwest Sucks", he was denied boarding because his behavior made other passengers "uncomfortable"

OP:

This time I was told that I would not be allowed to board the plane because some passenger had heard what the customer relations supervisor had said

the customer relations supervisor had said ABOUT WHAT??? Now I'm starting to feel doing "Church Lady" might help. ABOUT WHAT?? Could it be the weather? No. Could it be the menu item on the flight? No. Or, could it be the written comment: SOUTHWEST SUCKS! Or, put another way, I guess Silent would have us all believe if the OP had NEVER written that phrase, he would have been banned anyway!

Silent, you and your airline handlers will never understand this but, under our system of government:
"SOUTHWESTS SUCKS" + "UNCOMFORTABLE PASSENGERS" does NOT equal a denial of boarding!

The airline shills on here, Silent included, think a lot like **** Cheney or a TSA Officer at Milwaukee Airport: If the Constitution is suspended only on the "airside" of the security check point, that's ok. That's also insignificant. Just like an "insignificant" pregnancy. If this country violates rules prohibiting torture, but it takes place on a US military reservation in Cuba, that's ok.

Silent, I don't know what line of bull your airline masters are feeding you. But it's, obviously, a doosey! Clearly you would be more at home, or even happier, in a place like Iran or North Korea.