Ah, but the first case shouldn't be faded! I can't tell you how many times I've stumbled across commented-out lines of code, sometimes whole functions or classe

Ah, but the first case shouldn't be faded! I can't tell you how many times I've stumbled across commented-out lines of code, sometimes whole functions or classes, which were accidentally committed because they were too easy to skip over when reviewing the changeset. Again, take the example of the Post-it note: you want to remember to remove it later, not forget about it now.