There is a new TOS for Meta7. Soon for the whole grid we will have mature and adult ratings. Groups and avie names will change. Sims will change from PG< Mature and Adult to Mature and/or Adult.
To read more about it all: http://forum.meta7.com/viewtopic.php?f=4&t=592&p=1805#p1805
Now all the metas need to do is ask for ID or proof of age. I remember when the Lindens started doing that.
I've bought a home in a nice sim to park my avie at. I do see a lot of sim owners going private or group owned.