I also want to add that as women we are taught by society that we must care for others: our partners, children, family, friends and even others who we do not know well or have never met.
This burden is laid at our door and caring traits are prized in 'good' women in a way that is not true of the male experience.
I think that women internalise this with the effect that we feel 'bad' for 'not being nice' to other people, especially other women, even when we have no real obligation to 'look after' these people's welfare.
I think that Sali looks at this site through this lens - that we have an obligation to 'be nice' to her - and that, likewise, past guilty commenters feel bad for 'talking badly' about Sali and 'upsetting' her [for the record, I do believe that Becky is real].
Part of empowering women so that we can live lives with equal chances is allowing us to have more control over those we choose to care for. This may involve not automatically being the allotted carer to an old parent, or not assuming the majority of household chores when both partners work the same hours; it might also involve not always being the go to parent for parental 'admin' or emotional support (Ruth Bader Ginsberg's remark on her son's school only calling her when they needed to consult a parent springs to mind).
Lastly, and most pertinently, this may involve not being responsible for all of the internet's feelings, including those of people you don't necessarily like or who have not been good for your own wellbeing.
Women are allowed to unshackle themselves from this obligation to care for and 'be nice' to everyone disproportionately, which may have no healthy boundaries, and can have the effect of depleting and exhausting us so that we have nothing left to give to the people in our own lives who are most important to us, as well as ourselves.
Attempting to guilt women into having feelings that they have 'let people down' by ever expressing negative or critical comments is policing our inner lives in a way that is not conducive to progress.