Then you don't do it then, do you?
Well there are people that do do it, that's the point.
Can I politely suggest there are better uses of time of people on this than debating the moral rights and wrongs of a 17 year old eating a banana?
Like most things in life, this is a grey area - there is no 'black or white' answer.
Anyway, I've already stated that it is reasonable and legal to age discriminate on matters such as this.
Emd of discussion.
Don't know who gave you your high horse but its not up to you to end discussions.