This will not work in the Netherlands (although, see below, the law here might change soon). The law as written in NL prohibits reading data out of a user-device (fingerprinting) when not strictly necessary for delivering the service that was asked for. So getting things like screen-size and browser-name just for identification purposes is not allowed, because you wouldn't need those to deliver the service as requested by the user. Next to that, IP-addresses are under discussion for being "identifiable information", as is already the case in Germany.

Please do take this all with a grain of salt, because not a single website here actually adheres to the current implementation of the cookie-law. The political process has been set in motion to change the law and exempt anonymous statistics from the permission-requirements. This "soon to be exception" is already used by virtually all website and the regulatory agency responsible for enforcement seems to have decided not to make a problem of it for the time being.