Nah. Hamachi can be a little laggy (200ms ping), but if it's only being used with people you're already familiar with, the risk is minimal.Actually, FSD's LiNK system is a really neato implementation of Syslink multiplayer.
X-link Kai, annoying to set up but working miracles.
Hamachi is something I wouldn't trust.
Exposing your network to a stranger...
Dedicated game servers have to be paid for.
Once there's to little people playing to keep it profitable, they simply disappear.
Cycle of life in the multiplayer world ;/
/offtopic