I'm not sure the term "lemmings" has been used at all for this kind of herd behavior as IMO the suicidal aspect is the most important feature if you used "lemmi

I'm not sure the term "lemmings" has been used at all for this kind of herd behavior as IMO the suicidal aspect is the most important feature if you used "lemming". I think nowadays "sheeple" is the more appropriate term for that kind of mindless behavior.