With respect to the 'they don't represent my interests' or 'that's not how/where/when I ride' arguments against a specific BNV campaign well, if that's the case, I don't really see why you'd care so much if a specific campaign does not particularly apply to you personally.... BNV run campaigns on a broad range of cycling activities and modes. I don't think there's much point arcing up every time they engage with an issue that doesn't specifically apply to you.
On the other hand, I can see that, from a PR point of view, BNV are possibly trying to leave the general public with a (more positive) perception that road riders (ie. anybody who rides on the roads), bunch rides in general, and Beach Rd groups in particular, are:
A. not doing anything illegal by using the roads;
B. not just the cycling equivalent of illegal street car racers, and
C. are not (as bunch rides) simply a cycling free for all with no place on the roads.
Far better, surely, that the general public have the impression that riders, both individually and in and bunch rides:
1. are legitimate users of road space who are expected to follow the general road rules, just as drivers are;
2. follow well-established individual and group riding protocols for behaviour and safety;
3. are more organised (when in groups) than a casual observer may realise, and
4. are often managed/supervised/overseen (when in groups) by experienced riders.
Just my opinion.