What's legal and what they can't catch you doing are often two different things.
"Everybody does it; it's standard practice" would a lame defense.
I think you misunderstand.
I'm not saying 'they can't catch you' - clearly they ARE going to catch you because you are actually presenting a business proposition to them - showing them a variation of their work.
This really is standard business practise. The idea that you would be sued for it is just bizarre - since it is done thousands of time a year in one of the most litigious businesses on the planet .. and can you name a single time when someone has been sued for it in the last decade?
If you are a graphic designer in a job interview and you create a variation of your potential employer's current logo to show how well you can transform their existing work ... would you be seriously at risk of being sued? Technically, you might argue, you are breaking the law.
Thankfully - however - the law is a little more sane than that. As well as 'fair dealings' (or 'fair use') .. which this would likely be covered under, there's another principle in IP law called an 'implied license'.
So if something is standard behaviour (such as tourists taking photos of themselves in front of the Opera House) .. then by building an Opera House and letting tourists near it then I'm accepting that I'm giving them implied permission to create the minor derivative work of a cheap photo of the landmark. Yes - that photo is a derivative work .. but there is a certain level of 'reasonable behaviour' that gives protection.
If you want some case law to back it up something along the lines of Gracen vs Bradford Exchange might fit. In that case a painter had created a painted version of another artwork to show to the rights holder - with the aim of getting a contract and getting paid for their painted version.
The creation of the painter's version was deemed to be covered under an 'implied license' - but she couldn't exhibit her version publicly without permission. Because while there was an implied permission that she could create a new derivative work to show to the rights holder - that implied permission didn't cover selling the work to third parties.
There's probably dozens of better examples - but the idea that someone is at risk of a real lawsuit over it is pretty absurd.
If they wanted to they'd send you to C&D first - there's no reason I can see that you are more at risk being sued doing that than by driving to office for the meeting.
The law is much more flexible then a simple reading might demonstrate - I suggest 'Nimmer On Copyright' if you want to learn a bit about it.
Here's a quote from Nimmer:
.. There is a tradition in U.S. contract law that mere silence does not generally constitute acceptance. So also in copyright law. But silence and inaction here was found to establish a quasi-contractual license. Parker inverts the meaning of property rights.
Obviously it would be more covered by 'fair use' (again - read Nimmer for details) but it's a fascinating area.
Mac
(Again - I'm not a lawyer. Last month I was talking to a few of them on this topic as I was one of the industry reps reviewing proposed changes to copyright law - so some of this stuff is still in my mind. Implied Licenses is something that many people aren't aware of but are a pretty important part of making the law usable.
But some things really aren't worth worrying about.)