Hello Michael,
I am really sorry for the delay of this reply as it is a weekend for us here. You can actually turn off activity for user logons by accessing the back end settings of EasySocial . Please take a look at my screen shot here,
http://screencast.com/t/7fdcPXimDY6g
As for removing stream items for registration, you will need to edit the profile under the profiles area and under the "Registration" tab, you'll see a similar settings for logging into the stream
Hope this helps! Have a great weekend ahead!