1.: Going to the park will let you spy on others having sex there.
2.: Buying equipment from the mall will help you increase your chances of seeing something interesting.
– Binoculars increase your chance of seeing something interesting.
– Camo equipment decreases your chance of being caught.
– Night vision goggles allow you to spy on people any time.

3.: Voyeurism is illegal and if you get caught you can be fined/sent to jail as with other crimes. It can also help you increase your Larceny skill up to 1.