Really?

I belong to a group on Facebook involving local moms.  Well, one of the moms got her feelings hurt, and decided to leave the group.  Her choice, correct?  So after she left, one of the 'mods' decided to call her out about her choice to leave.   A whole bunch of moms called the mod out on her childish behavior, and the mod took her toys and went home.  I just don't understand.  We are all adults, put your big girl panties on and deal with it.  Not everyone is going to like you, deal and move on.  And please don't act like you're perfect.