I know there's probably a Security thread on here somewhere but I thought this might be specific to MacBook. I found two computers attached to me somehow but I don't know how. My router is locked down and I checked the MAC addresses of everyone connected and it all checked out. They showed up under the "Shared" heading in the left column of finder. I could not connect to either of them or get any info on them. Turning off BlueTooth didn't kill the connection. Any ideas on how they were connecting to me.