She is being half honest - she is leaving some comments up but is deleting and blocking others in the name of abuse - but I have followed this from the first ad and didn't see any abuse. Only thing I saw was someone say she should give the money back.
If the Mrs Meldrum stuff hadn't happened I doubt anyone would have batted an eye about it. Poor timing for Sarah but it is still very shady - reminds me when celebs do those tax dodges, although not illegal it is unethical, even if your accountant or in Sarah's case Mumsnet say it is OK.
I stand by my original view - if you care about the charity, give money, don't take it.