You can call yourself what ever you want and act owever you want. It doesnt' mean you will ever be a samurai. A little more research into the true samurai will shed a little light on bushido. The early samurai wasn't as honorable as people think. The code of bushido didn't apear till peace time as a means of giving the samurai a reason to still exist. Even though the samurai wasn't what everyone thinks they were doesn't mean it's not a good goal to work toward. The arts they studied and the way of the bushido is a good way to go, but going around calling yourself a samurai will only have people think your nuts or still pretty imature. The title of samurai wasn't something that could be given to anyone that wasn't born into it, it's not like being knighted. As for them regaining there honor and becoming samurai again? Thats not an issue since it wasn't a case of them loosing there honor to begin with. It was a matter of choice to not call them self samurai since there was no need.
There are no samurai, just a long misunderstood history.