Visiting my friend Howard, a few things became clear to me:
He was more able to see the connection between hackers and guerilla gardeners, than I could; his understanding is that any activity, especially those that are self directed and imposed, require a degree on ongoing flexibility and adaptability.
Reappropriation is about seeing potential and possibilities.
A set outcome is achievable through flexible thinking; like repotting and positioning plants indoors during winter.
Creating spaces and actively taking part in creating the things you enjoy.
And true subversion is not/cannot be documented!