This is the general understanding at the forums I co-admin on.
-
No Political/religious/derogatory commentary/imagery (as standard)
- No excessive advertising (1-2 links is fine (2 only if one is an image)). Maximum of 2 links per site with no more than three sites linked. However, if 3 sites are linked, only 4 links are allowed. (Blatently, I'm just trying to make life complicated
)
- Text should not be 20 lines with 2 lots of the enter button between each one (i.e. text should be ordered suitably)
- Image size restrictions (as in dimensions, not bytes)
- Not too many images in sigs. Any more than four is rediculous (to be frank, having two is plain stupid too).
I don't like character limits in sigs as they don't allow you to express a decent sig very efficiently.