Zing

not a lot would happen lol

If you had pcs connected and someone did sniff it out what could be done depends on the security of each PC. For example they could have passwords or permissions set.

Chances are though even if it was a fully up and running network with net access the worst thats likely to happen is someone uses your net. There are obvious data security issues but the majority of people wouldnt be interested in browsing your shares