>and they are about 50 lightyears away, busy building a slow annihilation fleet, arriving here anytime about 100 years from now, It's an interesting idea, but

>and they are about 50 lightyears away, busy building a slow annihilation fleet, arriving here anytime about 100 years from now, It's an interesting idea, but it raises the reasonable (IMHO) question, "Why would they bother?" It seems like an awfully big investment of resources for actions which wouldn't be of real benefit to them.