You can't stop tanning; the best you can do is help people control it. Toward that end, the industrialization of ultraviolet light is a blessing. It gives us the power to clarify, modulate, and customize dosage. Salons need oversight to make sure they help clients understand and manage this power. But if you shut them down or lock out teenagers, be prepared to enforce a dawn-to-dusk curfew or face an epidemic of skin cancer. If you liked back-alley abortions, you'll love backyard tanning.
For those of my readers in their teens and twenties, my advice to you is not to tan. If you do, you'll be sorry 5-10 years from now when you develop wrinkles. And there is always the risk of skin cancer.