Personally I amnt against the bubble concept as a whole.
Of course not! There are so many in genuine need of support and that’s what the concept was meant to be for. Too many people suffered so much more than was ever necessary first time round.
The issue is that people now think the term ‘bubble’ is a softener for doing what you want and justifying it by calling it bubbling.
Someone I know (can no longer call her a friend because the way she’s behaved throughout has disgusted me but that’s not for this thread) is one of those posting on social media photos of her and others meeting up for drinks and stuff in each other’s houses. Always with the ‘bubble’ word mentioned. However her teenage son holds houseparties in her home with maybe ten/twenty people in while she’s at her boyfriends for the night, (is the boyfriend another bubble then? Is the son in a house-party bubble?) the teenage daughter is constantly bringing back friends also, and I know they’ve then brought the elderly (and VERY vulnerable) grandparents round for cups of tea, all while she moans to me that the poor GPS are being ‘paranoid’ and don’t want to leave their house for fear of catching covid and how she’s sick of explaining it’s all over the top because they are in her bubble so it’s safe, and she’s having to half drag them to her house in the car to ‘get them out and about’
She genuinely doesn’t seem to understand how much risk she’s putting her own parents at by insisting on bringing them round in her car, when she’s probably been at her boyfriends the night before while the house was packed with drunk teenagers in that very kitchen they are now sat in for a pointless cup of tea that they’d rather not come round for.
The word ‘bubble’ seems to make her think it’s safe somehow?
I’ve had to just hide her social media and desperately avoid getting into any conversation with her because I can’t stand what I’m hearing and i really want it not to be any of my business.
Though I suppose I’ve just ranted on MN about it haven’t I. 
People absolutely are not acknowledging that a bubble means you and that household, and not both of you also mixing beyond it. Or maybe I’ve got that wrong and am hand wringing over nothing 