How can I protect myself legally if I do adult work?

I concur with prior responder. I would also point out that your reference to an over-18 waiver seems to be out of place. If a party is under 18...

Can I incorporate a one word trademark into a T-shirt design/advertising?

The key to most, if not all, trademark infringement questions is always likelihood of confusion. There are many factors which go into this, but...

Can I sue this company??

You should let the company know what happened. You were not harmed (other than the cost of the product you could not use) so you have no damages...

Can I trademark a company name that is not trademarked via the USPTO and then sue that company for trademark infringement?

I agree with prior responses. Were you to take the actions you describe, it is very likely that you would (a) quickly lose your lawsuit and (b)...

A vioded contract

The manager has the right to enter the rented room. The issue is whether or not she can take pictures without permission. I expect that she may...

I write Christian content and I want other Christians from using it without worry about copyright laws ?

If you wish to put specific provisions into a license agreement you are free to do so. What would be problematic would be to allow the works to be...

If you are trying to protect the idea of using a shoe as a pillow you are likely out of luck. If there is something new and creative about the...

I have written a libretto for a new Mock-Rock Opera using the score from an existing show. Can I use the score?

You are likely correct that you need to get a little help in drafting a letter to request the license. However, you need to retain an attorney to...

Can I use a food/drink or non-sport/non-apparel logo on a cycling jersey?

In most cases, not only is the logo licensed, but the wearer is paid by the mark owner for the advertising provided.

You have gotten good answers and I would just add that moving the medium from paper to weaving may not be a relevant modification, and could be...