Will I be infringing any copyrights if I use a phrase from a song on a t-shirt?

Generally, very short phrases are not protected by copyright, at least by themselves, although use of a very short phrase may be copyright...

If I unintentionally copied a copyrighted work, can I just destroy the copy?

Generally, your actions may have been copyright infringement, but there may be arguments of so called innocent infringement, under 17 USC 504,...

If someone wants to name a park after my deceased grandfather and use his name to raise money can I prevent them?

Generally, using someone's name for commercial purpose may violate their right of publicity, which may survive death, typically depending on state...

Can I?

Theoretically, a poem may be improperly on a website, and it may be important to check further into whether someone may have a copyright on the...

Generally, if you are taking someone else's trademarked product, and repackaging it, and selling, without permission of the original trademark...

Can I sue for false advertising if a product didn't have a feature that they made up to be very important?

You may be able to sue for and/or make a complaint for consumer fraud. See: https://oag.ca.gov/consumers You should discuss with an...

Do I still own a logo that I designed if I was not paid for it?

It is possible for someone to have common law trademark rights without a registration. If this dog groomer is using this logo as a trademark,...

Generally, a trademark may include brackets, parentheses, and various forms of punctuation. You should discuss with an intellectual property...

Can you sue a nonprofit organization if they use your trademark without your permission ?

Generally, a non profit organization may be liable for trademark infringement. You should discuss with an intellectual property attorney...

If someone violates my copyright, and I tell their employer, would I violate invasion of privacy/intentional interference?

Copyright does not protect ideas. Copyright generally does not protect very short phrases, at least by themselves, although use of a very short...