I don't think age really matters, I really don't care how old players are. I know players that are adults and players that are kids still in school, it doesn't bother me. I think it's wrong to say that younger players are not as mature as older ones and that older players should have something better to do than play games like Feralheart. Everyone is different so you can't expect players to be the exact same as everyone else in their age group.
When I first joined Feralheart at 12 I met a friend who was very literate, well mannered, respectful and mature. I assumed she was 15-17, I was wrong, she was only 11. Now I have met 11 year old players who were not as mature but that does not give me the right to look down on an age group, knowing that there are younger players more mature than myself. Especially if you don't know the player in real life, you shouldn't look down or give judgement towards a younger age group, make that any age group for that matter.
If you are going to be telling younger players that they should get the hell out of your space and play some other game then you are just being a bully. Feralheart is a game for all ages and everyone is allowed to play. There is a Block button if you are unhappy with someone; there is no need to upset or hurt anyone. If you are to stick with making a player's time miserable you can actually discourage them from playing online games and lower their confidence around older people. Being online is some people's way of escaping stress and painful times in their life. I know when I'm unhappy I come online every now again. To say that younger players are ignorant and immature when you have people like that in your age group is being a bit hypercritical because yes, you do get older players that are immature and ignorant. No age group is perfect.
As long as no one is making judgments and everyone is being kind and respectful towards each other, then everyone can be happy.