No, you can't fly in Italian Class A. What I was saying is that there is no apparent reason for having it. You can be assured that if you fly into it they will go after you.
The areas which this thread was referring to were (IIRC) mostly Class D. That is still controlled airspace, but it's obviously difficult to decide where the base of it is, over undulating terrain. I think that nobody gets too concerned provided you don't do anything too unreasonable.
There may be an ICAO rule for specifying the terrain base in these cases but I have never found anybody who knows about it.