I made such a hack.
Features (both configurable via AdminCP):
- Allows to limit signature to be max x lines
- Allows to limit signature to be max [ size = y], where 1 <= y <= 8
You can see it working @
http://www.planetliebe.de/vbb
The path is / v b b without the spaces, don't know why the board keeps on chaning that. Set limites are 4 lines, size 2.
If interested I can make this hack public..