Like Nemrod, I would be very hesitant to intervene, verbally or any other way, except for two specific circumstances: (1) if I noticed that another diver was in immediate danger of being hurt or killed by some moron; or (2) if I noticed a diver dispensing immediately dangerous advice to brand new divers who might not be in a position to recognize that the advice was dangerous.
Otherwise, its MYOB.
Diving is one of the last unpoliced frontiers, and it isn't my job to define "dangerous" for other divers. Perhaps what I consider dangerous they consider fun. Besides, as scubak noted, most experienced divers will recognize strokaphilic spewage for what it is, and will back away slowly...
YMMV.
Otherwise, its MYOB.
Diving is one of the last unpoliced frontiers, and it isn't my job to define "dangerous" for other divers. Perhaps what I consider dangerous they consider fun. Besides, as scubak noted, most experienced divers will recognize strokaphilic spewage for what it is, and will back away slowly...
YMMV.