> As with everything. It doesn't have to be that way. It could be made so that it's harmless, so that it has no effect at all unless explicitly enabled by an option. Then there's no need to carefully manage it. Users and packagers can set it wherever they want without fear of breaking things.
> You don't have to export variables. I would recommend not exporting > such a variable to begin with unless you're sure of its effects. It could be made safe so that it's possible to export it. Then it can always be set to some reasonable value. -- Matheus
