Here's another reason for spamming to remain unpopular.
Critics say it hurts the environment.
Online security company McAfee estimates that the 62 (T)trillion junk emails generated by spammers in 2008 could have run two point four million U.S. homes for a year.
McAfee says the energy from just one spam message releases the same amount of carbon dioxide into the air as driving a car three feet.
One estimate says that 97% of all emails are unwanted messages.