I don't think IABU but keen to hear opinions.
I am on my way home on the last train (the very very rare occasion I've been in it has seemed pretty manic) from the city.
I arrived at the platform, it's mobbed - last train from the city. I position myself close to the boundary line.
One man stood beside me also close to the boundary for getting on the train. The rest of his group stood back but regardless it's impossible to say where carriage doors will stop.
I was on his left. The train stopped with the doors close to him on his right, he walked to the door theb made a big show of letting everyone to his right on first holding his left arm out behind him to block me or anyone else on his left. Everyone to his right boarded. He then walked on, positioned himself beside the only remaining table for four then began nodding and pointing to his own group of people behind me. At this point half the people were already on the carriage and either sitting or blocking seats. Most seats were obviously gone because he'd made such a big show of letting everyone in to his right while 'holding back' everyone to his left.
There would never be enough seats for everyone on the last train, the carriage would be filled up with people standing from the city centre.
I walked onto carriage, ignored him pointing to the table to peoole behind me and sat down at the table for four.
His three companions came behind me and the four of them began sitting down, standing up, staring pointedly at me, offering each other a seat, staring at me again - all the while the seats around them disappearing. One of their party could have sat alone.
I'm now surrounded by three seated passengers glaring at me and one stubbornly standing passenger.
AIBU to think if they wanted to sit down they should have made it their business to board and find seats instead of expecting everyone else to acqueise to their 'manners' and wait to see what seats they deemed available!