yes you will be able to see that they made a thread. but you will not see the thread content.

yes you will still see that they posted something with in someone elses threads.

no they will not be able to post in your threads that you make, yes they can see what your threads\posts content are.

the ignore feature is for your protection (prevents you from being triggered by others by your participating with those posts\threads\ members that trigger you)

the ignore feature is not against others or for punishing others, it does not prevent others from having full use of the site meaning the person ....you.....place on ignore will still be able to make posts, threads, read all posts, threads including yours, will still be able to see all members profiles, will still be able to participate in chats, will still have access to all other psych central pages/features, placing a person on ignore also does not prevent them from discussing what they see in threads/posts of those that have placed them on ignore because they can make their own threads about what they can not discuss in a thread a person has on them on ignore on.

example if I put abc on ignore and post a thread about DID. I wont see anything abc posted/made threads about without first removing them from my ignore list.

ABC reads my thread about DID tries to post and gets a message that they are on ignore. ABC makes their own thread about the same thing and what their opinion of that topic is. I can not see what ABC posted because they are on my ignore list.

one key thing though if you dont want to see anything by the person on your ignore list you need to be logged in, when reading posts and threads while not logged in you can see all posts and threads just as if you were not a member yet.