For those who don't understand the hate:
The Marlin cross bolt safety is easy to accidentally apply if you are traversing rough terrain. It just has to press against your body. Note that you should be on half-#### as well, so this in itself is not unsafe.
The problem lies in that if you have it OFF (because many of us hate the things), and you accidentally put in ON without noticing.
Senario:
You see him... the buck you've been waiting for after weeks of sitting in the cold. You raise your rifle, thumb the hammer to full ####, and... ***CLICK***. No bang, just a loud mechanical click. The buck looks right at you and then streaks off at a full clip. Opportunity lost.
The very next day, you do what almost everyone does, and you disable the cross bolt.
You don;t even have to remove the safety. Set it to "fire" and then righten the set screw all the way down. It will jam the cross bolt in the neutered position. Nicer "false screw" delete kits are also available.