Well, the topic title is a bit misleading since it was not the airline who was insulted, but rather its customers. The airline was brought into disrepute, which is somewhat different.
The brouhaha would not be an issue if the Facebook group this occurred on was private (i.e. invite only). But since we don't know about those circumstances, we can't speculate. Clearly VS feels very strongly about its perceived reputation, especially where 'lacking' service is concerned.
Oh well.
S.