looks spot on to me other than the line which could be just human glitching or rushing/messing about when nobody cared

I doubt christies would consign without 100% info and they will have direct contact with PC to check lots out in bulk easily

the pencil and way of writing looks like ones I have had before and similar to trolleys sigs with the B and the Y in those shapes

dont see an issue

also this isnt mine

Christie's close pal Sotheby's consigned a balloon girl that was falsely dated by 12 years, with a falsely dated COA and a shredder inside it . they also sold a load of falsely dated test shreds so it was more than a performance. 
So why wouldn't Christie go that far ? 

No, I also talk about how Banksy painted with IDF protection and now stays silent whilst they commit genocide.
Or the fact that he sells the same junk under the name "Westcountry prince " 
- oh and about the various calls he gets his mate to make on rivals. 

This version of the signature is used throughout editions such as VLH, Nola, CYW, NBG, basically after barely legal. The  common signature for morons(and most prints up to and including Barely Legal)is the with the B having the vertical line through it and  the tail of y attached to the main body of the y, looking more like a y compared to the cup and saucer y of later prints.  It would suggest to me that not all sepia Morons were signed at the time of release, some stored and signed as they were sold at a later date after the new signature was adopted. The stamped signature in sepia Morons is the later version. Perhaps this was the point of changeover of signatures?

Same