Datashare Extension: Can services be removed from panel using this extension?

Currently using the Datashare Extension (http://www.adobe.com/devnet/air/articles/datashare-native-extension.html). The native viewer allows you to exclude specific services (such as Facebook or Twitter) via "excludedActivityTypes". Is there a way to exclude specific services (for example - Removing Facebook and / or Twitter from the share panel) using the Datashare Extension?