I have a tenuous grasp at best of the meaning of Dog-whistle politics.
Wikipedia defines it as political messaging employing coded language that appears to mean one thing to the general population but has an additional, different or more specific resonance for a targeted subgroup.
Perhaps this is an example of dog whistle posting relevant to Ebsworth Street only.
Play nice people - remind yourselves of the possible impact on your house-prices.
The street does not want to attract a reputation of being occupied by anti-social residents (not that I have evidence of any such presence) mixed with outbreaks of curtain twitching snitching (again without having observed any).