A person that is hunting hogs, wild boars, or pigs may go night vision hunting. There are many nocturnal creatures that can only be pursued with night vision goggles, and an individual looking to hunt those animals would be one who might go night vision hunting.
They have night vision
The possession and use of night vision scopes is legal. Using them for hunting is not.
Yes they are most definately illegal. Deer can not be hunted in the lower 48 at night or when conditions would require night vision. It wouldn't be called hunting if they were.
Many people use Bushnell night vision products for hunting or other outdoor related activities. Any application that might require you to need to see in the dark would count.
Night vision binoculars are mostly needed for night hunting or doing special night operations. They may be fun to have if camping at night, but are really not necessary. Your eyes naturally adjust to less light.
You can go to a website called OpticsPlanet and read reviews and get ratings for the latest night vision products. Binoculars.com also offer the same thing under the topic night vision. It seems like Armasight produce top rated night vision products for hunting. That brand will most likely suit your needs.
Night vision goggles don't have a good peripheral angle, but keep in mind if your using night vision goggles, then its really dark and the only person sneaking up on you will be someone else with night vision goggles.
A night vision monocular is typically used for enhancing visibility and observing objects or activities in low-light or dark environments, providing clearer vision and the ability to see in the dark with the assistance of infrared technology.
thermal cameras or viewers
You can purchase digital night vision goggles in hunting stores and sometimes in gun shops. If all else fails you can shop online for them, Amazon and eBay should be your first start.
Night vision scopes can be purchased in stores that sell products used for hunting. They may also be purchased in stores that sell spying or security equipment. Sellers on eBay also carry them.
Laws vary by state; night hunting is illegal in Alabama yet unrestricted in Alaska. For more information, refer to specific states' websites or read the article on High Tech Redneck Incorporated titled "A 50 State Guide - Is night vision legal to use for hunting in my State?"