I emailed North Columbia Heights Civic Association president Brittany Kademian, and she said one of the NCHCA board members, ANC commish Patrick Flynn, decided to propose it to ANC 1A, which represents the area. It passed 5-0 (with 4 abstentions.)
Here's the text of the resolution:
Whereas, the public space at the intersections of 14th St, Park Rd. and Kenyon St, NW is currently commonly known by a host of different names such as “The Plaza,” “The Fountain,” “Tivoli Square, and “The Square,” among others.
Whereas, clarity for the community and information to visitors would be greatly helped by the erection of a sign with the space’s proper and legal name, “Columbia Heights Civic Plaza,”
Whereas, a unique opportunity for community creativity exists in the design of said sign,
Be it resolved: Advisory Neighborhood Commission 1A is in favor of initiating a dialogue with the Columbia Heights community and the District Department of Parks and Recreation (“DPR”) for the purpose of erecting a sign at said public space, in accordance with all regulations and guidelines for such signage, as set forth in the District of Columbia Municipal Code.
Be it further resolved: Advisory Neighborhood Commission 1A asks that DPR give permission to the ANC or a community group, such as the Columbia Heights Civic Association, to commission and design the same, with the full and complete permission of DPR and any other affected District of Columbia Government Agency.Sure, it's not exactly ground-breaking legislation or a pressing issue in the community, but it's something nice and just goes to show that if you suggest decent ideas to people, they might run with them!
(And if you don't believe me, here's a couple of official sources for the name.)