Weather is good not good for tomorrow. Hope you've got a jacket"
I wave very tired and got on the wrong bus
Personally, I do not see these messages as relaying negative content in the sense that they are nowhere near flaming the receiver. If that is the best this app can do, then I suggest that the creators of this app go back to the drawing board and learn what negative content really is.
For me, having messages like that flagged as negative would be enough for me to stop using the app.