batty boy
To be honest we do find that the majority of crews coming through security appear to "loose their voices", they seem to think its ok not to say please or thank you. Maybe it's because they think they are far superior.
When we do come across a chatty and friendly crew we do comment to each other about it, because it's rare.
Some collegues told me that they were on T2 when a BY crew came through and just totally blanked them,(no please or thank you) the captain noticed this and in aloud voice apologised for his rude and arrogant crew.
NOW THAT DOES NOT HAPPEN VERY OFTEN !!
Remember it cost nothing to be nice !!