[quote name='TheRook' timestamp='1360405522' post='190869']
Just keep him away from the misc crew and team bong, they are a bad influence. And if he gets a shiny try not to trade with team rain.
[/quote]
While I wouldn't say that's entirely true... I'd say that there is a fairly large contingent of individuals who either are trolls, idiots, or actually mean/hateful/arrogant teenagers/racist/etc. Global has a lot of these, as does Channel 1. Channel 2 was largely safe until recently
As for the teams the ones that focus on 'inappropriate' materials such as Team Bong generally tend to avoid discussions of what that entails (usually because it starts a flame war) and also because they usually don't care about what is happening in the rest of the game. There are still exceptions though.
EDIT: Sorry thought this part was unclear. Full disclosure I'm an officer on Team Bong. Most of our members live in places where marijuana use is decriminalized or approved for medical use. As for discussions of marijuana, we generally don't start any outside of our own guild - if we get called out on our name we respond and if we see a discussion of it we'll join in. We'll never say (in seriousness) that marijuana is good for you or that young children (ie those of age 10) should smoke it - if you or anyone else sees someone saying this seriously (or at all to a younger child) take a screenshot and let me know. They won't say it again, at least not as a member of Team Bong. Anyway we're *mostly* harmless and most other teams are too.
Anyway if that was too long let me sum it up - its like any online game or forum or anything that allows mostly free chat. There are people who will be fine and nice and there will be very not nice people. IMO 10 is too young for this game, but if you think you can keep them from the worse parts of the game then go for it! PokeMMO is a great game and everyone should enjoy it!