If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
They certainly can help with exclusion, but they are not very useful for including people with specific morals and excluding people with different morals.
Language creates a barrier to entry. Willingness to learn the language then filters for certain values. To the extend that you can control the teaching of the language you can also add additional filters.