We go out of our way on Wikipedia to make everyone feel welcome to edit anything. If someone makes a good faith mistake, more often or not, you are sent a welcome message fairly quickly by either a vandal patroller or an admin. New users will get hit up after their 2nd or 3rd edit with a Welcome message too.
I have tools that help me help new users out quick in my dashboard. It's part of what I do. No body should feel afraid to edit Wikipedia. Ever. It's a public resource.
