...my threads? And my posts?

Good golly, I really, really hope so.

Nope. You're SOL.

i like this idea very much.... i wd like a foe list
(6)

I think there is one but i am unsure of how it works

This is from the User Control Panel:

Foes are users which will be ignored by default. Posts by these users will not be fully visible. Personal messages from foes are still permitted. Please note that you cannot ignore moderators or administrators.

Seems to me that you can choose to ignore specific individuals' posts (only in part I think) and that there is no way to prevent someone from seeing your posts.

Personally, if you choose to post something on a public forum that you do not wish a certain individual to see, then perhaps it is better not to post that opinion on a public forum and keep it to yourself or in PMs. That's just my thoughts on the matter.

Hope this helped