I can' t see myself doing it. I definitely wouldn't do it for a sport but may do it for something else. Firstly I think let kids be kids. Secondly I think sport is just entertainment. Its great as a hobby and to keep fit but nothing more than that. I certainly don't agree with the celebrity, money and general hoo hah surrounding sport.
I definitely wouldn't do this long-term but may do something short-term if I thought it was an appropriate / worthwhile activity eg. something in a more altruistic line.