The Photo ID "for Security reasons" is pure clap-trap. The full service carriers don't see a need for it so why do the low cost carriers? I will tell you. They don't want people making bookings a very low fares and then passing them on to others at a later date. easyJet supposedly had issues in the early days with companies making bookings in the name of a traveller who may or may not actually use the ticket at very cheap rates. If the original pax could not use the flight it could be passed on to someone else at no cost.