While I think the arrests are pretty much useless unless someone has the guts to file charges against the perps, I suppose part of the process is the collection of fingerprints. It would be a worthwhile effort to collate those prints with all of the past “civil” riots and press appropriate stepped-up charges.
“...arrests are pretty much useless...”
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I agree. I think putting some old-fashioned whuppings on some of these idiots would be enough to discourage them.