who's the arbiter here anyway?

Everyone; even our anonymous brethren.

Is it legal that ...

Legality is a matter of jurisdiction, statute and case law. Ethical rectitude OTOH is in the eye of the beholder.

In reply to Re^2: Ethical considerations of responding to posts made by someone obviously up to no good by hippo
in thread Ethical considerations of responding to posts made by someone obviously up to no good by kikuchiyo

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