Id' have nothing against inlines if they stick to using blackpowder and iron sights. Then they are just ugly, but not overly advantageous. But put a 50mm scope on them and suddenly I hear shooting every evening of late season muzzleloading, well after legal hours.
Well, you really wouldn't like mine then. I have a big flashlight taped to my 60-mm scope.
Seriously though, the last time I heard illegal shooting it was a guy with a sidelock. And a .44 magnum revolver.
7 shots in rapid succession, opening morning of the ML season. I saw his buddies later and made an issue of it, and they said "he practices his reloading a lot, and he's very fast at it." To which I replied "sounds like he oughtta practice his shooting more." Even with seven shots, he came up empty.
I guess he shoulda been shooting an in-line, because everyone knows traditional shooters don't comport themselves thusly.