In reply to McHeath:
To be honest, I am not surprised to see plenty of negative responses. Good to see the UKC dislike to reply ratio in full force though.
To be fair, using your scale the one I have in mind from yesterday wouldn't score that highly as whilst it was a nice big ledge, it was covered in goat poo!
As I acknowledged in my OP I recognise that the logbook is predominantly a record of routes climbed, but for me, my logbook is also a record of the crags I have been to, who I have climbed with, and the experiences I have had. Climbing isn't just about pulling on the rock but about all those other aspects combined, as well as getting on the rock.
Perhaps the correct way to log it would be to tie on, flail about on a route too hard for me and log a DNF.
Perhaps I am too kind (foolish?) walking in to a crag I have no intention of climbing at, and holding the rope for someone so they can get the session they want, whilst still wanting to look back through my logbook and recall my visit to that crag with some notes.