Command argument --no-exec-shield

[Jay Cliburn]

Does anyone know of a command that has an argument "--no-exec-shield"?
I'm trying to help someone over at Fedoraforum.org, and every time he
launches a terminal, he says he gets an error message: 

bash:--no-exec-shield: command not found

I know what exec-shield is, but I'm not aware of a command outside of
sysctl that would attempt to turn it off, and I can't think of a good
reason why anything would try to turn it off.  

Is --no-exec-shield a valid kernel boot option?

Thanks,
Jay