Sad.
Teach your kids that the internet is written in ink, and in this day and age everyone will see what you post.
There are very few ways to hide.
Poor kid. RIP.
(Best guess here) GAA = The Gaelic Athletic Association is an Irish and international amateur sporting and cultural organisation, focused primarily on promoting Gaelic games, which include the traditional Irish sports of hurling, camogie, Gaelic football, handball and rounders. The Association also promotes Irish music and dance, and the Irish language. (Wikipedia attribution)