Upon notice, both your boss and the human resources department have an obligation to investigate your complaint and to take appropriate action. The law also protects you against retaliation by the company or any of its employees after you have complained about the harassment. Your reluctance to take action is understandable but major attributes of a job that make it enjoyable are the workplace environment and the relationships that we have with our coworkers. As these deteriorate, the job will no longer look like the one that you originally chose and wanted. If uncorrected, these offensive experiences at work, over time, will corrode the environment and may exact an emotional toll as well.
Many companies have policies regarding the use of the Internet and e-mail by employees at work.
These policies usually prohibit the personal use of company PCs and they certainly do prohibit the type of obnoxious activity you describe in your letter. Be sure to check for the existence of such a policy in your company. I am having some problems with my boss. There is a law in the state of Massachusetts that prohibits secretly recording oral communication. It is called the Eavesdropping Act, and it has been on the books for many years.