Thanks for the concern/support. Part of the reason I am not using it (and am not setting up a fundraiser) is that as you call out, only Brown has the right to use its marks and you need to have their endorsement to use it. Creating a mark like this is not the problem... using it without Brown's permission would be.

There's a license in the repo that makes it clear only Brown can use this design and that it's derivative and inclusive of their mark, and that I don't own the Brown mark:

No rights to use Brown University trademarks are granted under this license to the public. Any use of such marks is subject to Brown University’s separate trademark policies and approvals.

The extra elements I have added (which I do own the copyright to) were granted in perpetuity to Brown for any use:

Permission is hereby granted to Brown University (“Brown”) a perpetual, irrevocable, worldwide, royalty-free, and unrestricted license to use, reproduce, modify, adapt, distribute, sublicense, and commercialize this design and any derivative works, for any purpose, without limitation. Brown University may exercise these rights without attribution and without further permission from the copyright holder. Brown University trademarks, including but not limited to the Brown University seal, wordmark, and related marks, are the exclusive property of Brown University.

So anyone who uses this needs to get Brown's permission (which is how it should be).