http://source.roslyn.codeplex.com/#Microsoft.CodeAnalysis.Features/CodeFixes/FullyQualify/AbstractFullyQualifyCodeFixProvider.cs,164 checks whether a namespace is accessible.

But that always returns true;
http://source.roslyn.codeplex.com/#Microsoft.CodeAnalysis.Workspaces/Shared/Extensions/ISymbolExtensions_Accessibility.cs,116

(or is this just future-proofing?)