Hello,
I myself own a few "trademarked" dot com domains.
They say that I'm playing with fire. I say bring it!
First, if the domain is composed of an English word(s), then you might be playing it safe.
Just because it's trademarked as selling chonies, doesn't mean you can not sell pet food on that domain name.
Domainers who have possible trademarked domains need to make sure that there is no related links related to the trademarked product(s). If so, then you might want to remove those.
Usually, what domainers should do with possible trademarked domains is, have a landing page with just contact information so a possible buyer can contact you.
It was smart of you to do research, but research is only good if you are planning to use it as a business or to gain knowledge about the domain name (which you did).
The question comes down to a "Gamble".
Meaning, how much are you paying for the domain name?
I've hand regged all of my so called "trademarked" domains. My gamble is just minimal, $8.17.
But, if you are planning of buying a "trademarked" domain for thousands, then your gamble is high risk.
Some domainers fight back and win the battles, then they add more to the asking price of the domain for getting them upset or time and money. Some domainers that took the gamble win big.
Domaining itself is a huge gamble. You can't expect of landing a huge whale by playing nice.
For example, look at Nissan. The original owners of Nissan.com have been in a battle with the auto maker for over 20 years.
Is Nissan Autos going after them? Yes!
Have they succeeded, NOPE. Is Nissan an English word? NO, but the name Nissan is the original domain name owners last name.
The old man Mr.Nissan sells computers not Automobiles.
