Wei Dai's tools are poorly documented, may not exist in the near future, and are virtually unknown to non-users.
No object-level justification can address the (even) more important meta-level point, which is that they made changes to the visual appearance of LW without consulting the community first. This is a no-no!
(And I have no doubt that, were a proper Discussion post created announcing this idea, LW's considerable programmer readership would have been able to come up with some solution that did not involve making such an ugly visual change.)
If it's worth saying, but not worth its own post, even in Discussion, it goes here.