There does seem to be a 'forgetting' of the dangers when in more crowded areas, supermarkets, parents outside schools at pick up/drop off, queues for food/drink establishments. I had a business woman standing behind me in the queue for our flight the other day having a very animated conversation with mask lowered spewing possible virions out, seemingly oblivious to any effects. The queues for passport control at LHR were also more 'cosy' than I would've liked, people just in mindless mode trying to get through as quickly as possible. Much of our behaviour is autonomous in nature, but times have changed, for how long who knows, but changed times calls for changed behaviour.