[k00pa]

I sometimes use similar approach with code to indicate really hacky code that should be removed before any bigger releases.

[iLoch]

I think that's what //FIXME: is for. TODO and FIXME are both commonly supported, as well as a few others.

[gknoy]

Similarly, when adding debugging-aid print statements, I prefix them with ">>>", and make sure I don't use it elsewhere.

[gcb0]

why not "debug: "?