Why bring your kids into it?
And if they are Internet-literate enough to find a swgoh subreddit on the Internet, then I hate to break it to you but they are probably smart enough to find pron and whatever nefarious things lurk on the web.
If you don't want your kids on reddit, make that your responsibility as a parent instead of blaming others for your children's viewing habits.
As for CG/EA, they have a link in-game directing players to this forum, not reddit. How would your "kids" know about reddit anyways? Oh that's right, they probably used it before SWGOH was a thing. No one is encouraging people to go to reddit , and if certain employees of CG want to post on reddit that is their prerogative. I'm sure CG isn't some sort of draconian company that prevents their employees from posting on Twitter, reddit, FB, etc.
Eventually the most important info makes it here anyways. I don't use reddit and I'm still up to date on this game. Perhaps your "kids" can do the same.