You talking the pre-load settings on the bottom of the shock? Just use a big channel lock pliers and turn it. If you need more move it back to 1 and add a 1/4" spacer. There are several topics on adding custom spacers for cheap.
Yes, there are benefits as well as drawbacks from making them tighter. Benefits are keeping a taller stance and keeping the shocks from bottoming out not to mention more ground clearance. Drawbacks are a stiffer ride when unloaded and a more aggressive axle keep angle. Yet the angle will not be outside Honda's specs if you dont build a lift kit for it.