The Lanham Act is going to have to be rewritten in the next few years. Why? Because the pronouns are outdated, as are some of the nouns. A future President might have a widower (rather than a widow).
For those who may not know, a petard was an unreliable salt petre bomb (basically a fertilizer bomb) used in the middle ages, most famously mentioned by Shakespeare in the context of army corps of engineers specialists blown sky high while attempting to undermine a beseiged city wall and thus being "hoist by their own petard". Hamlet Act 3 Scene 4.
As for taking, but perhaps not trademarking, living student athletes' names and more, legal blogger Gregg E. Clifton wrote an interesting opinion for the law firm Jackson Lewis PC.
One of the Heritage/DNA/Ancestry websites may be --and maybe should be-- in copyright-related trouble for monetizing former students' yearbook photos without permission. It is a class action, and likely to be important... because most Americans' photographs are in their old school yearbook, and the photos and comments may not be as amusing if made public today as they might or might not have been at the time.
That long ago time (my opinion) might have been before the internet, when the expectation was that the yearbook would be seen by a very limited number of people, and in the context of the in-jokes of the time. Perhaps "the time" might have been when Monty Python's Flying Circus was hugely popular, and everyone would have understood references to lumberjacks sniffing flowers, dead parrots and more.
The copyright in photographs generally belongs to the photographer, unless the photographs are clearly work for hire, or the copyright is assigned or licensed. The subject of a photograph usually has rights (of Publicity, for instance), unless they waive the rights.
On a less dark note, the fine copyright enthusiasts of MTP discuss Thom Tillis's thoughts for how the DMCA should be brought up to date to restore incentives for creative artists to... create.
All the best, and Happy New Year!