I don't think Kitten has really done anything that bad. BB change the rules all the time. Kitten is doing a bit of rule breaking and childish or not, is livening the BB house up in the process.
I haven't seen Kitten being particually nasty or vindictive in the house, she likes it in there and is seeing if she can find ways round some of BB's rules, wheather right or wrong.
Kitten doesn't have to apologize for someone's eviction either, at the end of the day she knew she was on a final warning, but never expected BB to carry out their threat, notice I say 'Their threat', not Kitten's. Kitten broke the rules and was most probably expecting to be evicted. It wasn't Kitten's idea to evict another hm, it was BB's to cause conflict amongst the hm's. Kitten plays up.. BB punish a different hm.....everyone blames Kitten....Kitten gets landed a guilt trip....hm's turn against her... BB is happy.
BB probably love Kitten's antics, it makes great BB for them.
As for using BB as a platform, kitten has admitted this quite openly, unlike Michelle stating she would like to be an actress, then her singing idol audition ( were you watching Mr Cowell ) there's her platform even if slyly done. Be under no illusions, they all have their own agenda's, their own platforms, for going in there.
I am not saying I always like Kitten when watching her, but at least she is giving us something to watch