Minty, you know what would make sockpuppeting even more fun is a sockpuppet flashmob! We could replicate the thought-environment inside GlueSister's head, trialling ways to bring it up with Gluezilla, GS's potential responses, revised ways to tell GZ she's being an arse, ways to excuse GZ at the wedding so guests don't bitch about her, ways to bitch with the guests without being caught by GZ, mumzilla, dadzilla or groomzilla....
The MN Hive Mind is made for that sort of thought-experiment!