Limiting the size of the user signature

[Zzed]

I recently created an unpublished hack where I limit the users' signatures to 10 lines and 2000 characters max. My forums have very high traffic and I could not afford to make this a real time hack. Instead I added a shadow signature field to the user table and put a copy of the possibly truncated signature in the shadow at the time when the user edits his/her signature. The shadow signature is the one that I display in the threads.

The reason for the shadow is to prevent the users from losing data in the sig by doing a merciless truncation.

Let me know if this hack is of use to anyone and I will release it.