Can't register a DMCA agent

AS noted, if this is a problem, just hire a US lawyer to handle it for you. This something we typically handle at the stage where we are preparing...

I have a public art installation. If people participate by writing down their answers, who owns the rights to the copyright?

The others offer good answers. You need to make sure that you have your terms and conditions of use drafted properly so that you can account for...

If I include the following items in the website, will I violate the retailers' intellectual property rights?

The others offered good insights. I think the only issue that alarms me here regards to your questions is #4. Linking is generally fine; of course...

AS noted, using quotes will generally be permitted. This is largely because using what amounts to a very small portion of a much larger body of...

If I have a name trademark in the united states and see the name on a business in the philippines do I have any legal recourse ?

There was a time when the Philippines was an American territory but it is no longer, so US federal trademark rights do not extend beyond the US and...

If I understand copyright law correctly, if a "Official Superman Logo" is tweaked to a given percentage, then the change is ok

The courts do not use percentages and in such cases and you have both trademark as well as copyright concerns. What you describe is actionable...

Is a simple "emoji" image protected by copyright?

Yes, of course. Notice how different platforms use different emoji types. I mean, maybe there are arguments about the copyright of something so...

What you are describing will clearly be an issue regards to the publicity and privacy rights of Bowie in your case. There is a distinction between...

Copyright question: Making a logo design utilizing a stethoscope in the shape of a ribbon

Are you asking from a trademark perspective whether your design will be confusingly similar with another logo already in use? If this is an...

Can you be the subject of a professional photography shoot, wearing a tshirt with a specific character?

AS noted, no one will likely know or care if this is purely personal use. But if you intend on promoting this in some way it can quickly cross the...