I can see no reason why they should merge the grids, keep the adults and the kids separate. If they want to make a new family friendly grid then fine, but be prepared for the influx of news reporters trying to get an adult to proposition them as they pose as a 14 year old.

It's not just about accessing PG areas, it's interaction with adults, it's disclosing details that shouldn't be discloses, it's the lack of liaisons. The main grid is like a bar that has an 18+ policy, sure kids could go in and drink pop, but the rule is 18+ and that's how it should stay.

However Linden Lab explain it much better than I can, just pop along to:

http://teen.secondlife.com/parents

Extremely good reasons why kids aren't allowed on the main grid are explained there and those reasons are just as valid today as they were when they were produced.

Say no to kids on the main grid.