IDs are rarely checked here in EU, why so? Or maybe rarely is exaggerated, but 50/50 at least. What security issue arises besides security theater, that's a dif

IDs are rarely checked here in EU, why so? Or maybe rarely is exaggerated, but 50/50 at least. What security issue arises besides security theater, that's a different checkpoint. What I do not understand, what is creative here? If he had a buddy pass, and was denied because of a full plane, how could he hope for an empty seat? That sounds super dumb? 2nd I don't understand: The scanning at the gate doesn't check for tickets scanned twice? It marks people off, not? I thought that is how they call sometimes missing people out? So why were there no problems when he or the real owner scanned the ticket a second time?