I am sorry. I hate it when i have to do this, because i know that it's really silly! But the only reason why i wouldn't shabiki anyone back, would be if they had joined the twilight saga club. I can see it on their profaili and i immediately go all prejudice against them.
I shouldn't, i know, but it's against my morals to shabiki someone who loves the Twilight saga. If you're only a shabiki of Twilight, sometimes i forgive you... if you've done something to earn my respect.

Which would lead me onto my inayofuata reason...
If wewe have done nothing to earn my friendship, and not joined any of my favourite/major clubs, then i don't feel obliged to shabiki you.
However, if i can see that you're a shabiki of 'Random' au 'Harry Potter' au 'HP v T' etc, then the probability is that i will shabiki wewe back.

On the other hand, if wewe are looking at this thinking that wewe haven't done any of these things, then feel free to shabiki me... i'll gladly return the favour! :)
xxx