On different trips I have noticed a sign in toilets asking not to flush toilet paper, but throw it in a bin next to the toilet. This was either on island destinations or in areas with rocky grounds.
Personally I don't like this concept of toilet use, but understanding the rationale I respect the request and act accordingly. On various occasions, especially in public places, I was confronted with a full bin and not feeling the urge to create room by compressing a bit I usually look for another toilet.
Now my question, what if you notice the full bin too late? How would a local react? Should I just flush it and report the full bin?