Flew about 50 F domestic segments this year, majority in bulkhead aisle seat (my favorite) and never witnessed more than a few minute block of the lav.

Also, as MIKESILV already stated, what's the difference how the announcement is made. The message is the same. There are some FAs that are still somewhat scared of 9/11 type incident. Whether it's justified or not is not the issue. It comes down to either accepting AA's policy or flying another airline. Simple.