I think it's important that more individual guilds are connected, or that players can be connected to multiple guilds. When you've got a guild that actually functions as a Criminal Guild, you've got a bunch of criminals with nobody to commit crime against. When you have a general RP guild, it tends to be without direction and stales quickly. Connect the two together though, and you coordinate roleplay between the criminals and the general masses of RPers. Connect that, then, with a Political or Law Enforcement guild, and you have someone for the general folk to rely to combat the criminals.
What do you think about connecting guilds together? What about players having multiple guilds? Have you played some games that did this well?
In addition, do you think the community should have some sort of structural guidelines to help new guild founders to give their guild some direction?