I do not agree with the ignore position. if that is what you do then what have you done to make it a better place? Moderation is fine but will never set the tone for a group such as this. it is the members and what they tolerate that does that. so ignore and make all things permissible in fact be ignorant of most of it. When there are none left off your ignore list you will have earned every silent moment of it.
I in fact believe just the opposite should happen. you should speak up. point out there behavior is unacceptable while still encouraging varying view points. there is a standard of behavior that is acceptable and that which is not.
Would you allow such behavior at your club meetings? would you allow it in your home? if not it is not appropriate here either. Difference of opinion is one thing. argument, insults, antagonism and disruption are another. I ay ti starts with the banning of such replies as "Why do that" When someone has asked how to do something or advice on how t do it. The answer to that question is obvious. because the person asking has chosen to do it. and questioning such a choice never belongs in a conversation ti is not intended to be constructive, informative or helpful. It is not the same thing as saying I would not advice doing that because... The difference can be recognize simply by seeing that the first way is putting the person in the position to defend their choice. Need to defend without questions means that an attack has been made. and attacks are unacceptable. In the second case the person is being informed with no need to defend their choice. Opposition to the choice has been shared without it being a challenge to the choice.
This is just one of thousands of example of the difference between acceptable and unacceptable. and when others decide for themselves that what they saw take place was unacceptable and say so. behavior will begin to correct itself.
I have actually seen a conversation nor two recently that has gone very well and actually contained great information. so maybe their is hope. Btu in all when the members of this group really get tired of the BS . they will end it. Moderators do not even have that power. It can only be stopped by the very same people that cause it. And I don't always think that is the moderators. in some cases I think it is.
Stand for what you believe, even if you stand alone.