It's BS.
> if said attack leads to more than 80% of national population being effected by unidentified beings
Effected means to actually do something, to execute, produce or bring about something. It's an action word of actually doing something, i.e. "He effected a reorganization of the finance department."
Affected is used to describe something being impacted. This is a word you would commonly use when something has been impacted, i.e. "The accountants in finance were affected by the reorganization."