Hi Paul,

These are just resolved through dependency injection, in fact, if you look at the VisitorGroupCriterionAttribute you can see it implements the ServicePlugInAttributeBase.

That means that ejecting the registered instances should make them unavailable. It's not that obvious how to do this via StructureMap, but I quickly tested the following and it seems to work (no guarantees!):

[InitializableModule]
[ModuleDependency(typeof(DependencyResolverInitialization))]
public class RemoveVisitorGroupCriteriaInitialization : IConfigurableModule
{
    public void Initialize(InitializationEngine context) { }
    public void Uninitialize(InitializationEngine context) { }
    public void ConfigureContainer(ServiceConfigurationContext context)
    {
        // If you wanted to remove all criteria
        //context.Services.RemoveAll<ICriterion>();

        // Remove selected criteria
        var criteriaTypes = new List<Type>
        {
            // Site Criteria
            typeof(NumberOfVisitsCriterion),
            typeof(SelectedLanguageCriterion),
            typeof(UserProfileCriterion),
            typeof(ViewedCategoriesCriterion),
            typeof(ViewedPagesCriterion),
            // Time and Place Criteria
            typeof(TimeOfDayCriterion)
        };

        var criterionPluginConfig = context.StructureMap().Model.PluginTypes
            .SingleOrDefault(x => x.PluginType == typeof(ICriterion));

        if (criterionPluginConfig == null)
        {
            return;
        }

         var instances = criterionPluginConfig.Instances.Where(x => criteriaTypes.Contains(x.ReturnedType));

        foreach (var instance in instances)
        {
            criterionPluginConfig.EjectAndRemove(instance);
        }
    }
}

/Jake

This is extremly helpful and is exactly what I wanted. Thank you!