[Puller]

This would be like youtube somehow, u can subscribe to ur favorite members and be updated whenever that person makes a thread or post.
The subscriber count a member has can be put under the badges. This can also show how much u can trust a member while downloading programs or accepting advice.This will also show the how good a hacker a person is based on other people's opinions

[Cryptic™]

I highly doubt this will get approved. It is not needed. If you want to follow their posts/threads just go to their profile and click "Find all Posts"/"Find all Threads"

[24601]

Too much server load. Will never get approved, although I would totally use this...

[Harry Dresden]

You basically find everything you need on a user from their rep and Find all threads/posts.