I noticed that when i tick "Allow posters to view other member's topics" to NO, users cannot see Pinned topics. Pinned topics should be seen IMO since nobody would pin a useless topic.

I'd like to see an option or have it default to let users see Pinned topics when "Allow posters to view other member's topics" is set to No on a forum.

I agree, that doesn't make sense that pinned topics wouldn't be visible in this case. :)

Announcements seem to work fine and are visible. But announcements are very different from Pinned topics.

Hmm. I can see your point, but I don't necessarily agree.

Consider this - I'm using a forum with this option as a "ticket system", where naturally I don't want anyone (but admins/mods) to see all topics. I might want to pin a topic ("ticket") to set it as priority, or to remind myself to address it the next time I visit. I wouldn't be able to do that if we implemented what you are suggesting.

I think announcements are generally sufficient for this purpose.

I understand, but that's why i said id like to have an option for this. Maybe an option per forum/sub forum or the ticket system?