I don't think it is harmful to give people the option to spaces primarily speaking about local matters and concerns, and primarily occupied by local people. It does not take away the other spaces.
We are already in an age where it is almost impossible to undo globalization, and nothing I do will prevent those who frequent mixed and international spaces (or more accurately Western dominated spaces) from doing this. It is only giving them a place that didn't exist before for content they couldn't post or read elsewhere.
Most of the world already has this. I don't think Arabs having it will be harmful.
I suppose lack of RTL support would be show stopping, so I'd have to wait for that first. Thanks for the hard work!