Should hotels just let negative reviewers gush their worst? The Web gives people the opportunity to display their dark aspects to the full. Anonymity lets you say what you like to whomever you like. And woe betide if someone makes you mad, or even just a touch uncomfortable.

The hammer and sickle of your rage can be cast toward them before they've even realized what they've done. It seems, though, that some enterprising humans have decided to use their newfound online power in Mafia-like ways.

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