Jeez Greg - those guys were just taking cheap shots.
Its a well known fact that bleaching your lines is a given if you want to look really cool out there.
Just check any of those 'best & most influential kiters' you see at national comps (or at places like Woodies

). They wouldnt be seen dead with anything but sparkling clean, crisp, new looking lines. And how else do they keep them so new looking - bleach - its the only way.
Lets face it no-one rocks up to a contest with faded yellowing lines.

That'd be like wearing coloured bindings

(to match your kite or boardies) - no way - they
have to be white; always white; AND sparkling clean as well.