Hobie adventure/Revo 16 keel drain plug leaks?

[King Saba]

So I recently picked up a second hand 2014 adventure and am liking a lot so far. It's fast, sleek, and fast. But, with all great things they are not without their flaws. For me it's this thing:



It's the keel drain plug. It seems completely unnecessary and more of a safety hazard if anything. Has anyone had any experience with leakage issues? It's really stupid honestly to put a drain plug below the water line of the kayak. The only thing keeping me from sinking is a rubber O ring and that's not too reassuring. I'm thinking to marine goop the threads of the plug and seal the deal. Anyone else have better seal ideas? Thanks!