When collaboration fails and it's just time for advocacy

As much as possible, be careful not to burn bridges. Hopefully you will want to try again for some level of collaboration in the future.
When nothing else works, then it may simply be time for education. The question then becomes, who do we need to educate and how.
There are many venues for education.
Community meetings, the internet, letter writing campaigns, mass media and various forms of public protest are all ways that can be used to educate.
Please tell us what you have found to be productive.