Ramming seems to be a tactic implemented by many people. It is a high risk vs. reward tactic, but that is what makes it so fun.
So would it be possible to implement different types of naval rams as weapons/addons.
A historical reference.
http://en.wikipedia.org/wiki/Naval_ramThese could be made in many different shapes and styles depending on what kind of damage, and how much damage you would want to do.
Obviously there would have to be a downside, so very large rams would slow your ship down, or make it difficult to maneuver. Smaller rams wouldn't do much damage to hulls, but perhaps are sharp and could puncture balloons. There are many things that could be done, and I think the dev teams artistic talent are up to it.