You don't seem to know "hidden" Nazi references. Over here, Nazi references are widely illegal (which is good), so they avoid that law by using increasingly obscure references, which are then banned as well.
The 8th letter of the alphabet is H, so 88 => HH => Heil Hitler. This is why over here, e.g. it's not possible to register a license plate with an 88 in it.
Especially in Germany, these laws are so strict, that one guy was sued for displaying a pictogram of a stick man throwing a swastika into a waste bin, even though it was clearly meant as derogatory towards the swastika. They fixed this part of the law in the meantime.