Can I sell prints of artwork that contains stylized drawing of Darth Vadar?

You would have to obtain a license to use the name and image from the owner of the trademark and the copyrights.

Are you legally allowed to open someone else's mail? If not, what are the consequences?

While legally you are not allowed to do so, I doubt the police will do anything about it.

What do I do?

If you do not respond, then he should eventually cease bothering you and move on. DO not give him any information. If he truly is a lawyer ask...

Can I sue customers for buying/returning educational audio cds

Your customers are committing copyright infringement if they copy the disk and then return it and continue to use the information on the disk. If...

Can a company enforce their trademark when there are many other companies with using the same word?

Possibly. Unfortunately, a full infringement analysis would have to be performed by trademark counsel. Generally if a mark is weak (usually...

What permissions do I need to create a licensed product for the Detroit Tigers?

YOu would need to contact the MLB licensing team to obtain the necessary licenses to use the logo and team colors and they will likely want to see...

What can be done about someone selling fake name brand products as genuine products

You may have recourse as a private attorney general depending on the false advertising statutes of your state. Contact your consumer protection...

How long does it take to get a check when you have a arbitration and won?

Your attorney needs to send a demand letter to the insurance company demanding payment. Ensure that your attorney has converted the award into a...

Yes it is illegal. As my colleagues noted this is called doxing. You had best consult with a local internet attorney and take care of this...

What are the laws (FDA or otherwise) governing the sale of a natural (drug-free) nasal spray?

You need to go onto the FDA website and research non-prescription nose sprays. Good luck! You also might consider speaking to an intellectual...