I have yet to find anyone in my city I play with...
People will use emotes for sexual things, this is nothing new. It's not about policing people on the internet, it should be about educating the public. It may no tbe SE job to educate, that falls on to parenting and/or friends. Educate kids in the old school tradition...my mom taught me growing up to never talk to strangers.

In this day and age, I would tell my kids it's important to not give people you don't know information about you. Don't talk to strangers, don't think that everyone on the internet is out to be your friend. If any parent is actually following the ratings system of this game then your kid would be 13 and as a result I am 100% sure they can handle what you're going to tell them.