How do you defend....
Defend? But why should I defend it? I'm not part of the AIS system, only another user of it like yourself, for 35 years now and never had a problem scanning past stuff that obviously doesn't apply to my flight. It might take me a few more seconds to read it but I consider a little personal patience and diligence as a necessary part of the requirements of the job.
If everything was filtered, by whatever means, to suit an individual, how could you/we be sure that something relevant/important wasn't missed off?
Have you voiced your concern to AIS? I did some years ago when I had a query, as per my previous item above, about the inclusion of airfield names, rather than only an ICAO code.
