Rereading, perhaps I can understand a point, if you mean that countries should automatically share info about potentially dangerous citizens who could be in another country.
As far as I know, there is no Europe-wide sharing mechanism for the moment. I already posted what I'd found on that a few weeks ago. Some countries are only just in the process of thinking of a sex offender register at national level.
And any such system would have to be kept securely away from fans fluttering confidential documents out of windows.
Yes that was the point I tried to mean. I remember the document you sent. And, yes, the guarantee of this intelligence's confidentiality might be the main factor explaining there's no sharing at European level, each State having to protect its citizens, whatever they did.
It seems very complicated.
Each country has its own legislation regarding privacy, age of consent, reflections as to whether personal details of former criminals should be made available or not... I can well imagine that it's a nightmare to make progress.
Then there is the issue of suspects under surveillance.
Every country has its leaks and is at different stages of establishing a police press service.
No doubt countries do cooperate on a case by case basis - or have a history of mutual confidence.
The UK and Spain seem to be working well together on a bilateral basis at catching sex offenders or other dangerous criminals. So it does seem possible, but it will take time to establish, or re-establish, mutual confidence between other countries.