I think the increase in people using spaces isn't because people are taking the piss but because circumstances are different this time.
Last lockdown, a lot of people who worked in say greggs or a local cafe were off because the business was closed. Now, they have to work as those businesses are, quite understandably, doing takeaway provision. Someone I know has a wife who wasn't a key worker last time (he is) but now is because the company she works for started making PPE.
I am a secondary teacher. DH works part time but in work that cannot be done from home. If he doesn't work, he doesn't get paid. In addition, he provides essential care for his mother who lives in her own home but has alzheimer's. She needs support to wake up/get up or she would sleep all day, take medication, make food etc. He is the only support she has.
Last time, I wasn't doing remote lessons for all -just a couple of A-level ones. Everything else was setting work/emails/curriculum planning. Despite being in a dark place due to my Nan dying, I kept DS (then Y1) home and muddled through.
This time, I am required to teach my full timetable remotely, plus I am supporting an NQT (and other colleagues as I am 2nd in department), plus continuing with curriculum development/meetings/delivering cpd/chasing kids not logging in or completing the work. I cannot work from home as my rural wifi won't support that. So, I am in school full time to do my job and look after vulnerable/KW children.
Therefore, I am using the key worker place this time as there is no one to care for DS while I am at work. I am well aware that people may begrudge me of that but without it, I can't provide the quality of remote learning and care the pupils deserve as well as supporting my own son with his learning.