I wonder what the nature of this conversation was. What we know is it was a minor. We don't know whether this was a male or female minor. We can take from Dr. Disrespect's now deleted confession tweet that it leans into inappropriate territory.
This leaves a lot to speculation. Since we can say the texts was of a sexual nature, this leaves possibilities which could be viewed very differently based on context.
For example, let's say the minor was male. Let's say the "sexual in nature" was Dr. Disrespect threatening this minor with sexual innuendos. An instance of this, Doc could have said something along the lines of "Bitch, see me in COD, I'll fuck your face just like I did your mom". In this case, it would be a minor, it would be sexual in nature and could be considered inappropriate.
I think many of us, myself included, imagine this sitiuation is sexual in nature toward a female minor and Doc is being a creep trying to lure this female minor into meeting him somewhere to act on these texts.
I say this not necessarily to defend Dr. Disrespect's actions, but more so to highlight just how little we know about this situation despite all we have seen and read about.