Hello Przemysl/aw,

  PP> You said the "no" and "yes" have the same weight
    > sometimes...

You are mistaken.  I never said (or even implied) that here.

  PP> On the other hand "No" can have positive meaning
    > during e.g. brainstorms (aka vehement discussions).

Brainstorms and vehement discussions are two entirely
different animals.

  PP> No, I said I would stop to deliver ideas.

I think that would be a shame, but I think it's especially
important in a community of voluntary involvement to deliver
them tactfully.  Here's an example:-

   NetBSD has worked very well for me over the past ten
   years.  I have noticed that some of the documentation
   seems a little out of date.  My available time is
   limited but if I can give something back to NetBSD by
   helping with the documentation, I am more than willing
   to invest some time.  What can I do to help?

See, I've established that I have some experience with the
operating system, identified an opportunity for improvement
and made an offer to help.  There's no agenda there, no list
of demands and hopefully nothing that is going to irritate
people too much.

I think you may have started off on the wrong foot, in part
because of language and cultural barriers.

For what it's worth, the above offer to help with
documentation is not just hypothetical. If there's something
that I can do to help, I'll make time available.

- Andrew Ball