Problem
You are working as a software developer for a service-based organisation with a large web presence. Their site receives a large number of hits each week, especially from people wanting to access the large number of links hosted on the site.
You are asked to develop a system that tracks users of your employer's web site and work out, using a variety of really clever tricks, the email address of the person looking at a particular page, and create a file which records this, attempts to identify the person, and looks up a variety of public information via search engines and government registries.
The result is to compile a profile of the person, their interests and activities, so you can tailor individual messages to them which you can then send. Your employer suggests the person will benefit from such targeted information.
You are also asked whether this software that can be turned into a bot which is loaded onto the visitors computer, to save your server from having to do all the work, and extract relevant information from their machine.