Prisoner MJ tribute done under duress?

Some prisoners are saying they were threatened with violence if they didn't participate. When it comes down to it, it was more of money generating scheme for the prison, rather than any kind of ode to Jackson.
http://news.bbc.co.uk/2/hi/asia-pacific/8611740.stm

http://news.bbc.co.uk/2/hi/asia-pacific/8611740.stm
