It should fall upon the team to properly do a reverse image search to confirm the content they are accepting as original content to fall under copyright law under grow diaries name actually has been produced by the person claiming such picture. In the end it all comes down to copyright law, all its gonna take is some guy to put gd in court over improperly licensed images.
But that's just my 2 cents, if i see it i will just straight up take it to grow diaries, but not everyone's gonna be like me, and some1 will definitely find their content in here and take the chance to score their lottery ticket.
Stay lit, i'm out.