Epic win

The internet is dynamic. People come and go. Just because you have seen it before doesn't mean everyone else has, go outside, live a little, stop being an "expert". The most repetitive content on the internet is "This is a repost." Think about that.

If something's been posted further up the same page then point it out and the poster will probably let out an embarrassed whimper, otherwise deal with it, this isn't your internet, no-one cares what you have/haven't seen.

Or just hit the ignore button, simple.

Fair do's it's just the 90% hit rate that was irking me

I have.