Yeah, it doesn't have to reflect on your approach. Just imagine you're the 50th person to approach. At that point she'll be like "No." to people, cause she's just tired or replying. Best thing you can do is just forget it and go on. ^^
So far, my impression of MnF has been superb, judging by the few days I have been on.
The game itself satiates the Lewdness in me aplenty, the roleplaying aspect is really fun, and people are generally nice, if forward. The awkward things I encountered here are not even unique to MnF, I feel - any adult/erotic game or roleplay community has similar, so no downgrade in my eye!