HeartyBalls,
"I recently flew a flag carrier and was surprised to see a sign (in just two languages) saying to return to the cabin in the event of a loss of cabin pressure. Is this common? Which airlines are removing O2 from the toilets?"
I have travelled on carriers that have had the same signage, BUT, O2 was still available in the toilet. Was there a sign saying that O2 was NOT available? Did you confirm that in fact O2 was not available? I think it may be the said carriers SOPS to have everyone seated back in the cabin. I find it VERY hard to believe that emergency O2 was not available in the toilets.
McHale.