Why is it ok for HBGary to take money to compromise computers, but when Anonymous engaged in expression of speech they are targetted by federal investigators?

Why is it ok for HBGary to take money to compromise computers, but when Anonymous engaged in expression of speech they are targetted by federal investigators? Or why weren't criminal charges laid against the responsibles at Sony BMG after illicitly infecting thousands of computers with malware, (http://en.wikipedia.org/wiki/Sony_BMG_copy_protection_rootkit_scandal http://en.wikipedia.org/wiki/Sony_BMG_copy_protection_rootki...), while a pimply faced teenager in Wyoming pulling such a stunt would still be rotting in jail?