Hasn't been the first or last time this idea is mentioned but yeah, it would be neat if it could be used like this. The trouble is the harpoon physics are perpetually broken. Then there is the other factor of giving up a mount slot for it. Perhaps if there was a utility mount slot added to ships, so then you wouldn't need to give up a gun mount.
Actually, you could just make this a pilot tool. Pilot can activate evasive steering based on where they are looking. It would then shoot a grappling poon out and latch on as long as the pilot keeps the activation button pressed. Likely would need a cooldown to avoid abuse. Otherwise we'd have spiderman ships swinging through Paritan or Canyon...wait a min...Spider-Squid, Spider-Squid da da da da Spider-Squid...zomg JACOB!! NEW BARON SONG FORMING!!!!