According to Wikipedia this violation is worse than plagarism and you may be liable for monetary damages:
"Though many jurisdictions impose penalties for certain blatant acts of copyright infringement and may try to stop certain infringing imports at the border, copyright infringement is still mainly prosecuted through private lawsuits by the copyright holder or their exclusive licensees. When successful, these lawsuits will typically impose monetary damages against the infringer as well as injunctions against future infringing uses."
http://en.wikipedia.org/wiki/Copyright_infringement#Penalties