Blocking Filters?

Anyone have any ideas on how to keep filters from being indexed? With hundreds of categories, products, etc… (I couldn’t even begin to say how many combinations that is), Google is going nuts indexing these filters: /[category]/?subcats=&Yfeatures=******** and /[category]/?subcats=&Yfilters=********

I have not only disabled filters for now but also added Disallow: /?subcats= to robots.txt yet Google is still going nuts indexing these.

That´s crazy. Google dont should indexing this sites. Thats really bad. If you have news, please post it!