...DISCLAIMER:
This lock screen uses adult language, and literally gives you the finger upon auth failure, so be warned.
All images and random phrases can be changed by creating files under the .BloodyProfanity directory.
Files that can be overloaded include:
.BloodyProfanity/conf/sarcasm.yaml # random fail messages, begin every line with '-' (see yaml docs for more)
.BloodyProfanity/img/bg.png
.BloodyProfanity/img/error.png
Other settings can be changed by editing the globals near the top of locker.py.
...