Leads to poetry written by adults, which is sometimes a good thing.
Alfred Tennyson -- started writing at age 8. Wrote most of a blank verse play by the time he was 14. First published poems appeared in Poems by Two Brothers when he was 18.
William Blake -- Started writing when he was 12.
James Langston Hughes -- started writing poetry in eighth grade.
Shel Silverstein -- started writing lyrics and poems at age 12.
Robert Frost -- started writing at age 15.
Ted Hughes -- started writing poems at age 11.
William Cullen Bryant -- wrote his first poem at age 13.
John Keats -- started writing around age 18.
Sylvia Plath -- first published at 8, kept writing through her teenage years.
If you have more, /msg me.