The problem is that the TIs' communication are also depend on the Internet. If we lose the connection, then we may not be able to communicate easily. This problem could be solved if we share phone numbers or mailing addresses with the TI friends. Some TIs and organization share their phone numbers and such, so it also help to get connected.
Here is the suggestion: how about to create the the resource package including the information on EH, GS, and famous EH/GS cases? I mean, what I think important is the reliable resources that the individual TIs can use as the backup of their claims even they are disconnected from others. When they want to file the case, such package can help the TI to give enough credibility.