They keep it quiet, because socially it's on a par with voting for the White Nationalist Party or being able to speak Klingon. But believe it or not, some supporters of Glasgow's favourite totem of reaction have become well-known beyond their own lodges.
Here's a few:
Gordon Ramsay
Nell McAndrew
Robbie Coltrane
Marti Pellow
Alan McGee (former Oasis manager)
"Lotto lout" Michael Carroll
Midge Ure
BBC business reporter Jeff Randall
Chris Evans (well, wore a huns shirt on TFI Friday when he was hanging out with Gazza)
Andy Cameron
Martin McGuinness (only joking!)
An array of a-listers that would be hard to beat, but can anyone think of any more?
Here's a few:
Gordon Ramsay
Nell McAndrew
Robbie Coltrane
Marti Pellow
Alan McGee (former Oasis manager)
"Lotto lout" Michael Carroll
Midge Ure
BBC business reporter Jeff Randall
Chris Evans (well, wore a huns shirt on TFI Friday when he was hanging out with Gazza)
Andy Cameron
Martin McGuinness (only joking!)
An array of a-listers that would be hard to beat, but can anyone think of any more?