Only the stuff linked from the README is supported. Any other files in the repo are either old stuff for historical reference purposes or new stuff being worked on and not yet ready.
Considering the data being processed I'm fairly relaxed about security. If you have any security concerns about any code in this repo then please log as an issue.
There should be no expectation that issues will be treated as a high priority, but I will read the issue log and provide updates for as long as this project holds my interest.