Aides are now spending hours each week combing through accounts on Instagram and Twitter to moderate comments after they discovered hundreds of messages - many of a racist and sexist nature - were being left on their feeds.
According to our sister publication HELLO!, Kensington Palace has removed various comments from their social media pages.
While the overwhelming majority of these comments are positive and engaging, buried among them are some that are viewed as being "very aggressive, particularly with each other", said a source.
Palace sources have said that officials asked for help with the most seriously abusive posts, which are taken offline.
The head scratching headline is one that needs a little further information before it makes sense.
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A source told HELLO!, "The Palace has always monitored comments but it's a hugely time consuming thing". Abusive, racist, sexist or violent comments or messages are reported and deleted.
On the day she was announced as patron of four charities and visited one of them, Smart Works, trolls targeted Meghan with a string of criticisms including accusing her of faking her pregnancy to get attention, trying too hard, walking strangely, touching her baby bump too much, and being too slim.
The duchesses do not have their own public social media accounts.
Magazine this week launched a "kindness" campaign urging posters to think twice before posting nasty comments. And had we just gone to London for no reason other than to have a reunion, it would have been an wonderful thing.
HELLO's Head of Digital Sophie Vokes-Dudgeon added to the outlet that "issues of low self esteem are rife among young people these days and we feel, as a responsible publication with high values, we need to lead the way".
Since George was seven months old, they have worked with Spanish nanny Maria Borrallo who works closely with the family, attending family events that require royal schmoozing.