If you don't now what ACTA is, search the Internet for ACTA, that should let you find your own sources. If you do know what it's about then you are likely to be against it (unless you are part of the 1%).
On February 11 2012 you can protest against ACTA with us. Get information about your local protest here and join in.
In the meantime, you can also do a couple of things while keep your rear end glued to your chair:
I'll see you there.