As an aside: If you are aiming to grow an 'adult' audience, rating your news posts "M" or "A" will make them show up for users who filter out "E"- and "T"-rated submissions. ;)
While there will always be people asking "Sooo... Where are the tits?" (because they did not think this far), nobody will be 'angry' if you rate submissions higher than you would need to (and there is no rule against it).
Enjoy your stay.
Yatsufusa
Welcome to Newgrounds.
As you've just learned: _Never_ put all your eggs in one basket. Check out where other artists who publish similar works upload their content. Then create accounts in those places as well. That way, even if some of the other places are not to your liking, you will still have alternatives.
Nobody on NG will look down on you for having accounts on other sites as well. ;)