Why have advertising networks become controversial?

Why have advertising networks become controversial? What, if anything, can be done to overcome any resistance to this technique?
List and describe some Web site design features that impact online purchasing.
What are some of the difficulties in providing services in an online environment? What factors differentiate the services sector from the retail sector, for example?
Briefly outline the types of information an organization would gather before writing the organizations information security policy document.
Briefly describe the most important functions to look for in project management software and why they are important.