This may be uncharitable, but I have serious doubts about people who pre-emptively declare that ugh, they can't say anything to anybody about anything because somebody might jump to the wild conclusion that they're secret racists!

The walls are thin, 6am is early.

But, you know, maybe LW can ask a Black friend to make the request on their behalf, assuming they have one. Or, alternatively, since they're a big old wuss and I certainly have no reason to suspect them of closet bigotry, they can invest in some cork and a soundproof curtain. Pin the cork over the offending wall, hang the curtain in front of it, sleep better. (Also use a white noise machine.)