If it was done at the behest of the filmmakers that is one thing. If it is a fan doing it for their own preferences that is one thing. But the idea of colorizing B&W classics is to me sacrilegious and not because I am just a purist or anything. It's completely manipulating the original image and by pasting this stuff over the original cinematography, the image is destroyed. I absolutely lost it when I saw what they did to Casablanca and The Maltese Falcon, had no idea that so many others got the same bastardized treatment.
That said, there is one title listed there that does need some work, and that is the 2 strip Technicolor film Mystery of the Wax Museum which was re-timed poorly for it's DVD release.