And at some point, someone looking for a payday1 is going to take video of us being herded off a cliff by an asshole2 even though we don’t actually do that unless provoked, and it will become a totally wrong impression of us that enters the common knowledge base.
Ironic, since lemmings don't actually jump off cliffs. The people making the documentary (Disney) that's famous from actually threw them over the cliff to make it interesting.
I like calling communities "slice" better, because even without the context, the people can guess what it may be. The context is a range of sources quoting:
A group of lemmings is known as a ‘slice' of lemmings.