I dont compare maemo to other OS...it was just a note to topic. I know maemo is other. And I have found everything I need here on maemo.org. Only the one app, last, i need.
I know Pycallblocker, but it has in name ''call'' what means, its just for blocking calls. I need also the same but for messages.
Maybe is the last way find it, as you have written, studying the Python or c and so...
I have no idea how it works in programming. It seems like I go to learn something new..