I've notice they delete negative comments. Now I seen some unfair comments like " she said me and him will be together but he's married" i'm assuming they didn't disclose that to the advisor and I find that unfair for the advisor but I've seen another comment when someone just said first prediction didn't past we shall see about this one. the next day the comment was gone. Same with one comment expressing how nothing came to past, didn't connect and the advisor was being rude with them the comment got deleted but the name still appears and is still a red face but its blank.