After some searching, it appears that RIPE has no actual abuse policy but that everything is still hanging in limbo.

I was looking for an address to report hacker activity to and it appears that you are a) not in the business b) not equipped to handle it c) barely qualified to assign blocks of IP addresses so that the addressee can self-police, unless they are hacker/spammer organizations. In which case the rest of the worlds choice is to ban RIPE assigned addresses. Hopefully RIPE will mature soon!

If in fact you DO have a group assigned for the purpose of investigating hackers, please make it available on you web page.