Scupper plugs are unnecessary in the absence of scupper holes. When you're paddling over higher waves, more water is likely to make its way through the scupper holes and into your kayak. Water will also be more likely to spill over the sides of the kayak and into the cockpit. However, if your cockpit is completely dry when you get out of the boat, then there was no water in the cockpit to begin with. Scupper plugs do not prevent water that gets into your kayak through other means, such as through cracks or holes elsewhere on the hull. The best course of action if you suspect that you or someone you know has ingested alcohol is to seek immediate medical help. Alcohol poisoning can cause serious health problems that may not be apparent immediately, so it's important to get treatment before it's too late.