Andrew McGinley says he has shut down a Facebook page dedicated to his children after "rancid" comments and "scandalous lies" were posted by some users.
Last week Andrew's wife Deirdre Morley was found not guilty of murdering her three children Conor (9), Darragh (7) and Carla (3) by reason of insanity.
Since his children's deaths, Andrew has started a number of projects aimed at celebrating the "all too short" lives of his two sons and daughter.
One of those projects is the Conor's Clips YouTube channel, named after his eldest son.
Speaking on The Pat Kenny Show, Andrew explained: "On the night they died… I was standing outside the house, and my house had become a crime scene. I was in shock and fairly stunned… but you’re just thinking about the kids.
“I thought about the last time I held them and kissed them and hugged them. I then thought about the last promises I hadn’t got around to keeping. For Conor… he wanted a YouTube channel. He wanted to put some comedy sketches together that we were going to film as a family and put them up.
“Alas, we didn’t get the chance to do that, so the next best thing for me was to create a YouTube channel in his name.”
Andrew started the channel shortly after his children died, and also set up several social media accounts to share the videos and support the project.
He says the experience on Twitter and Instagram has been positive, while he has gotten some "absolutely brilliant" support from the public through the Facebook page as well.
However, he said he has also seen some "absolutely horrific comments" about himself and his family posted on Facebook.
He said: "I was going to abandon Facebook last year… there was one horrific, horrific comment that stunned me when I saw it.
"It was later removed, and unfortunately I didn’t get a chance to take a chance to screenshot it. [But] it was appalling... somebody claiming to know the family and know the facts of how the children died.
"This was even before the gardaí compiled all their evidence… and this was not a person known to any of us in the family.
“For them to be allowed post something like that, and then gain support for a scandalous lie with other people rowing in behind it… I was stunned."
Following his wife's trial, he again saw similar comments - including from some people falsely claiming to "know the true story" of what happened.
Andrew said: "I still have a great experience on Twitter and Instagram, but thought I just do not need the kind of commentary that is attracted to Facebook.”
He says some posts were removed afterwards by the social media, while some people would delete the posts themselves after he challenged them about it.
However, he doesn't believe Facebook is taking enough responsibility for the comments left by users.
Andrew is also continuing to push for an urgent review of the care and treatment his wife received.
Earlier this week he said he had “no doubt” his children would be alive today if doctors had kept him up to date on her mental health.