An anonymous reader writes "HERF guns have previously been regarded as nothing more than an interesting project with uses ranging from at-home experiments to malicious pranks. But the deployment of 'morally gray' forms of high-tech crowd control, such as the recent use of a sound cannon against domestic protesters, along with the likely future unleashing of the pain gun on more than just 'foreign terrorists,' creates a new purpose for these relatively easily assembled devices. Could HERF guns become a new method to counter the silencing of protesters via these sophisticated attacks, or is there any other way to prevent such efficient, convenient crowd dispersal?"
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