we are the nation notorious for over reaction first of all.
secondly if you are so concerned, be part of it (and tell other pti lovers that you know are concerned) to help pti not to make a nad decision.
The kind of panic you are refering to I don't see it in here or on pti official website.
Yes people have concerns about new people joining in but certainly not the way you are saying it.
If you personally know the corruption of someone joining pti let them know, if there are case already in court against someone they won't get tickets,
But if there is someone whose corruption cannot be seen or there is no proof of it, then you can't blame pti for that.
its good to expect things like this and we need that, but expect everything perfect in this bizzarre situation is in my view not very practical.
coming back to your point that does not mean he is not changing or not willing to change anything.
we don't know what exactly would happen but I still have hope,
I think the current disaster is going to push the elections date earlier on, and that can make iK to rush through things,
That won't be good but looks like it will be inevitable (serious)
This is the question every 2nd person who has been supporting since more than decade has after 30Th OCT. As you said I am keeping posting the same comment more than 90% PTI fans are doing this if you don't believe that I can develop a analyzer software you can execute and see the results. On my concern you can see this link and it is a fact .... don't come back blindly saying you are supporting some other party I never voted to any party ...
http://www.youtube.com/watch?v=8IBRbHe6zlY&feature=player_embedded#!