That is nice. Keep it up.
Anyway, I noticed a bug just now (or at least I think it is a bug). See the picture below.
Here I was alerted that I was mentioned in a private topic. Though I cannot go to it since it was not linked, that is not supposedly happening, since I don't have access to it, right?
If the answer is no, I'd say it is a very strange behaviour to a user when he finds out (by being alerted) he is being quoted in a private place whether for a good thing or bad.