Like in Instagram, I think that Scratch should tell you when someone tags you. For example, if you are Role Playing in a group, then you do not have to tell each person what you told the first person. You could just tag each person then type out the RP. If someone credits you for using your stuff, I think you should be told immediately.
What I'm Looking For:
If someone types @<username>, then <> Should get a notification (I. E.: @User1 Debbie walked towards her car. @User2 Debbie walked towards her car. @User3……! Instead, @User1 @User2 @User3 Debbie walked towards her car.

Thanks!
HappyParakeet