Not surprising. That spreadsheet contained data that would have been very hard to obtain, such as the exact number of changed votes. If you are able to obtain such specific info, you should be ready and willing to explain EXACTLY how you got it. Where’s the big document containing the details?
The Mac address is not included in the TCP-IP packets sent over the internet, so obtaining it for a machine that is not on a local network is difficult. Getting the Mac address of a machine that you have detected IP traffic from involves getting access to an access point that machine is connected to, penetrating the source machine itself, or observing traffic on a local network it is attached to.
Even the most rudimentary hackers know how to avoid those situations.