Comments are simply ignored. You can't read them. You might want to read a commented config file in, make a change to a setting and then write that out. You can't do that. But you can write comments using the 'allow_no_value=True' hack, as long as long as you put it in a section.

> You can't have comments at the end of a line

You can. You need to use ';' for inline comments and you must proceed it with whitespace. Are your users ready for that?