Good first post, and welcome. There are a number of methods being used to detect and delete the bodus registrations, some more effective than others. In some states, judges are blocking the best remedies, and in others, ACORN is taking an absolute beating (politically).
Keep an eye out for the "acorn" keyword - it will help you to assemble all of the info that is available on this site.
Was I kind enough ?!? ;-P
I am wondering now why I never posted before.........this is fun. Now I have someone else to talk to besides myself about all of this.