When mask wearing was mandatory everywhere, whenever I stepped into a toilet the first thing I did was remove my mask to wash my face, gargle etc. Mask-wearing only resumed when I stepped outside the toilet.
Cowardly Sinkies can try the same if they actually believe people would be camping at toilets catching them for not wearing a mask in an ambiguously indoor/outdoor place. Let's see how long this farcical charade keeps up while civilized countries have already abolished all mandates, including vax passports (e.g. SafeEntry, VTL).