Describe some illegal reconnaissance activities.

What will be an ideal response?

There are a number of plainly illegal reconnaissance techniques. Developing a "front" company and acting as a representative of that company, specifically for the purpose of robbing or defrauding the target company, is probably illegal. Furthermore, being expensive and time consuming, this is probably reserved for the professional intel agencies. Stealing garbage is illegal in many locales. Entering a home or office to look for information is also illegal, but this often goes undetected as no valuables are being removed. Dropping a keylogger-a tool that records users' keystrokes-on a vulnerable machine is illegal. Leaving a sniffer, which can intercept and read data packets, on a network is illegal.