I apologise to anyone I have offended or upset by standing by the door - I will be sure to never do it again.
As far as questioning goes I was questioned at the first class check in about my job and what I do for work, who I work for, Where I work, who my boss is etc. As first I wasn’t sure what exactly the point of these questions were for but once I did I gave her way more information than was needed and she stamped my boarding pass.
I was never question at BA first check in or any of the other times I have flown to the US in the last year; none in business class on BA, none on Norwegian to JFK either. I agree that LHR seems to have super zealous security checks with every fluid you have in the bag and on display and random bag checks which I did see when I was boarding (except when flying BA first it seems as they didn’t even seem to care if I opened my bag or not).
By contrast the TSA here at O’Hare didn’t ask me to open my bag, didn’t check the liquid sizes etc; just put it through the x-ray machine and were done.