Yeah Freedom of information is an important feature.

I agree with you that blocking of internet content does violate civil rights, and the actions taken by the Slovenian government are disproportionate in this case.
But I don't think that calling for EU intervention based on the directive of free information flow would help, since EU law lacks guidelines how to act in such a case (same with other areas concerning information technology and new media, like software patents, copyright and data privacy).

The case of bwin.com currently is very present in Austrian media, since the French police arrested two leading managing board members of bwin.com (which is an Austrian company), they're accused of breaking gambling monopoly laws. Though many agree that a state controlled monopoly on gambling is necessary, the arrest is discounted as overreaction and is believed to be only an attempt to keep up the revenues of the state-owned gambling companies.

According to a judgement by the EU court of justice, prohibiting internet betting sites is illegal except on demand of public interest. This could be a way to invoke to EU actions against the Slovenian government, but I fear that the directive of free information flow is not much more than a hollow promise at the moment.

Btw, I just returned from a vacation in Slovenia. I was much impressed by the beauty of the Triglav national park. 😀

I wouldn't be surprised if Sweden was the next country to ask ISP to block access to foreign gambling sites - and for ISP's to blindly follow through.