Updated 8th March 2018
Did you know that every time you like or comment on a public page on Facebook that it will then show up on Google search?
If you've liked a post by your child's gaelic team which features your child then that will be recorded by Google. Anyone who searches for "your name" facebook is likely to see that picture of your child. The less common your name is the more likely the picture will come up.
This enables other people to profile you and your private life based on the likes and comments you make on Facebook.
Give it a try yourself. Google "your name" facebook and see what comes up. Make sure to do an image search as well to see if pictures of your family or where you live are up on Google for all to see.
If privacy on Facebook is important to you then stop liking or commenting on public pages.