Is it possible to sell your pet (which you have leveled and owned) on AH ?
Only if you didn't capture it in the wild.
Originally Posted by Blizzard Entertainment
(Blue Tracker / Official Forums)
No, it's neither harassment NOR ninja'ing to roll on any item the system allows one to.
Nor is it against any rules to votekick a member from the group - one person can't do it, apparently someone agreed with the rogue.