Oh, there are so many potential AIBU rants that a single trip to Sainsbury's can generate. But what about the whole business of parking the trolley at the till while going off to finish the shopping.
Sainsbury's was busy and there was a queue at every till. But I spotted a till where someone's shopping was being scanned through, and there was a divider at the end of their shopping, with a big space and no-one waiting. When I sped over there, I noticed a full-ish trolley queuing by itself, with no-one attending to it. No-one had started unloading it on the belt - so although I realised that someone probably intended to come back to it, I thought it was quite reasonable for me to go ahead, as I was ready to start unloading - and there was loads of space, as the person in front was nearly finished.
As I got on with this task, a middle-aged bloke rushed back and said 'but I was here first', or words to that effect. To which I replied 'you weren't here - and you can't reserve a place in the queue, that's not how it works!' He remonstrated for a bit, then went off muttering about what a mean woman I was. Am I really? AIBU? Is it OK for people to stake out a place in the queue while they go off to finish their shopping? I'm sure I would never do such a thing .