I was in LHR a few weeks ago, flying with BMI. There was a guy blocking the entrance to the check-in desks and pointing people towards the automatic check-in machines, which all had queues.
I'm not normally a shouty person, but I ended up being
allowed past when I stroppily pointed out that there were three check-in staff just sat there doing nothing
There were a group of Americal tourists behind me who had no such luck. 'Twas more than his job was worth to let them by.
I'm guessing that there'll be a nice statistic soon saying that a significant proportion of passengers
prefer to use the machines.