Just because you are no longer being discriminated against doesn't give you the right to discriminate against others.What's unique about ageism relative to other forms of discrimination is that it's a time-dependent factor and everyone has the expected inevitability to transition through each of the sides.
In the case of juveniles, they'll eventually grow out of it (couldn't help myself) and become the very adults they believe are robbing them of rights.
By your reasoning, anyone who doesn't exactly fit your narrow-minded view of "mature" should be discriminated against. And hey, while we're at it, why don't we discriminate against black people and women too. WTF?I find this is a severely biased account. Yes, ageism is a reality, but there's a reason in the majority of cases. There are exceptions, but young people on average are generally more reckless than elderly people. This would indicate a lack of wisdom. Why else would the majority of crashes on the road be caused by people between the ages of 16-25?
Do you think that because someone is different from you, they shouldn't be treated as a person? Do you think that only people who are exactly like you should get equal rights?