[Marco van Herwaarden]

Well your code is not configurable per usergroup/user.
Your code does not control who can SEE signatures.
It don't work real time.
No 'Soft' remove
No moderating of Sig's
No statistics
No Limitation in number of lines
No group control over smily usage
No control over number of smilies
No control over which BB-codes are allowed
.......

Could go on for more then 10 lines like this

Seems i need more then 10 lines to describe what your code is missing.

PS Not trying to burn you down now, but you really did ask for a reaction like this.