Hello Digit,
For cannabis related topics and discussion on legalization, there are a number of threads on the topic. For instance, Cannabis Current Events (Part 2) is a good thread to post related events. This is within the Smoker’s Lounge category. There is also a sub-category related to security and legal discussion, Security & Legal - Overgrow.com. Topical threads can be created there.
Activism unrelated to cannabis, if it’s political in nature, is purposefully restricted to avoid bringing discord into the public forum. History has shown this to be divisive in nature and the conversations end-up deteriorating over a short time span. FWIW.