All of the boys went on to find their connection with Peter Pan to be a bit more torturous than magical. Many had uneasy relationships with the controlling Barrie, and they were mercilessly hounded by the press, who would report their every move and, annoyingly, call all of them "Peter Pan" -- even though one of them really was named Peter.
And the headlines weren't always terribly positive. Two of the boys died young, and under devastating circumstances. George died in World War I at age 21, and Michael drowned at age 20 while swimming with a friend in their university's pool. It's widely believed that this was a suicide, since he couldn't even swim.
Unsurprisingly, Peter was the most heavily tormented by his association with Peter Pan. It continued to haunt him into old age, and he eventually threw himself in front of a train in London. Naturally, the headlines read "Peter Pan Commits Suicide."