Nah, actually they were designed that way for a reason. When a trench was rushed what they would do is just stick the stock into the bottom of the trench bracing it with their foot and wait for the enemy to hop down and impale themselves. You really did want a good long spike (not so much a blade, my Mosin bayonet is more like a big screwdriver) long enough to ensure it can reach vitals the long way and a good solid mount and "blade" as there is soon to be a full body hanging off it. The bayonets would actually affect accuracy as their weight attached to the barrel would alter the barrel harmonics. The Russians never even made sheaths for theirs, if it wasn't on the end of their rifle or opening a can of borscht they'd just stick them in their belt.