Bus drivers who see you standing at the stop with your arm out, but don't stop.
Put a complaint in to the bus company giving time and stop location.
Over Christmas we were abandoned by Arriva in Bishop Auckland. We'd been waiting at the stop in the market place for the last number 6 from Durham to Barnard Castle (only the first two in the morning and last two in the evening run to Barny, past us in Burnthouses, the rest just go to either Cockfield, Ramshaw or West Auckland). It didn't turn up, or rather avoided the market place and went round the back as the driver had apparently thought the Christmas market closure was still in place ~ it wasn't. We had to get the one after that which only went to Cockfield and get a taxi for the rest of the journey (from Tindale as it happened as I doubted we'd get a taxi from Cockfield and the wife's phone was flat so we had to ring from her workplace). After a couple of e-mails Arriva offered to pay the taxi fare and in lieu of the fact I didn't think to get a receipt (durrr), are sending us a shopping gift voucher to the value, which is pretty good of them.
Whether you'll get any recompense will depend on whether you were stranded or just had to get a later bus, but at least the driver will get a ticking off. I have a great amount of respect for bus drivers by the way, in the order of HGV, PSV drivers they seem to be at the bottom of the pile, pay wise despite having the shittiest job.