The grandparents are the ones that raised these poor kids' stellar parents in the first place - why continue to compound their mistakes by letting them screw up the next generation!
I don't really agree there...sure, they got Britney and her little sis into show biz. Sure, they made some choices too. But, the BAD decisions were the ones Brit has made.
It's very possible to do a better job raising your grandchildren than you did raising your children. Case in point - my husband and his grandmother.
The big issue is to get them out of California.