No joke but I actually kind of get the case for modern Western MD secession (as long as Frederick and Carroll County comes along, otherwise its a fiscal nonstarter)
The state always screws us over in terms of highway funding and rifle/shotgun firearm legislation without consultation, as well as disbursement of education funds.
In terms of the TL, I wonder what the impact of not having to garrison MD will be on the Union. In OTL they spent a lot of resources guarding the state throughout the war. Perhaps a bigger main Eastern Army? The OTL Maryland Union contribution was relatively small as things stood. I believe more Tennesseans fought for the Union than Marylanders did.