Unfortunately HN didn't allow me to edit the comment. 1127 however contains the definition of many terms and I believe the same conclusion can be drawn from them (Trademark does not apply to noncommercial use).
Here is 1125(a):
(1) Any person who, on or in connection with any goods or services, or any container for goods, *uses in commerce any word*, ...
As such, it does not apply in this situation.
Further, 1125(c)(3)(C) is an exclusion across the entire 1125 subsection (and yes, for dilution, which is what has been argued here).
https://www.law.cornell.edu/uscode/text/15/1125