Just realized something with the red bandanas...

[Coola Yagami]

Seeing as the Foot wear red, as does the Shredder in the Mirageverse... and that Hamato Yoshi himself was a member of the Foot, from which Splinter, and in turn the Turtles learned their ninjitsu from... I suppose the all red bandanas do make sense in the sense of a 'clan'. But I also realized all the red could still have been homage to the fact that the first issue was a Daredevil parody. I wonder why they decided to give Shredder a purple outfit instead.