I agree with @markstinson and @spyder. You guys make great points.
Making things illegal only creates a unregulated black market. With that being said. It may be time to start trying to grow your own.
The black market thing is not really going to happen. There is only a handful of people using snuff (or chew) in Finland, and there would be no real demand to bring it in illegally. However, there already exists a well established black market for snus and I, for example, would more likely buy snus than make hard arrangements for snuff or turn back to cigarettes.