[Mindwipe]

"Effectively" in legal terms means "to have an effect" (as in any effect at all), not that it has to be "effective" as in "good at it's job."

The plain English meaning of the word isn't really useful here.

All "effectively" in laws such as this (and the European equivalents) means that there has to actually be some mechanism of protection, i.e. you can't just have a file full of junk binary in the directory called "DRM" that doesn't do anything and claim circumvention by deleting it. But there is clearly an effect here.