STOP TO COMPARE MAEMO with others OS.

Maemo is in Pole Position for everithing, it has the power to give you All without Switching On a computer for advanced things!
Maemo is open and you gotta be open too, PyCallBlocker does what you're searching for. To add it in autoexec mode use google and find My Thread about that.

edit:
If you don't like this kind of app, you can also leanr about c, or C++, or Python and Qt.. Community works in the real life too, we just have to say thanks for everyone's here and for all the people did something for maemo. Source is made for that, you can edit/adjust etc to implement new features
This is a free community, and people works all the days, you have a life, i have a life, we have a life, they have a life.. the time, sometimes, is not enough