Funny

Misleading advertising is illegal in the EU and I assume that the same is true (to some extent) for most places outside the USA:

Prohibition of unfair commercial practices

1. Unfair commercial practices shall be prohibited.
2. A commercial practice shall be unfair if: it is contrary to the requirements of professional diligence, and it materially distorts or is likely to materially distort the economic behaviour with regard to the product of the average consumer whom it reaches or to whom it is addressed, or of the average member of the group when a commercial practice is directed to a particular group of consumers.

Whether the advertising above is illegal, would be for courts to decide. It depends if an average customer would fall for it. That would also depend on the circumstances: Next to a highway where you only have half a second to read the sign, it would be illegal, but maybe not next to a footpath where you can read it for 2 minutes before passing it.