Facebook launches new Groups feature

From what I can tell, there are no privacy settings, and you can be added to a group without your permission. My friend just did a test where he created a group, added me, and it showed up in my feed to others without any confirmation from me adding myself to the group. To any readers here:

1. Is it correct that this is the default setup?

2. Is there any way to change these settings? I don't see any, but I may not be a power user of facebook's security settings.

3. If the answers to 1 and 2 are yes and no, respectively, are people as appalled by this as I am? As an example, right now someone could make a group called "Americans for Anal Fingerings", add me to it, and now it shows up in my grandfather's feed. I have done a lot of work to keep from my grandfather that I like anal fingerings, and now all that work is all down the drain!

I'm curious how the frid.ge folks feel about this one. Seems very close to what they are doing.