CHICAGO — Chicago-area native Nikko D’Ambrosio made a national media splash earlier this month when he filed a lawsuit against dozens of women who allegedly bad-mouthed him on a tell-all Facebook dating page, describing him as “clingy,” a ghoster and a show-off with money. Turns out D’Ambrosio’s dating reviews were the least of his worries. On Friday, D’Ambrosio, 32, of Des Plaines, was convicted in the same federal courthouse where his lawsuit is pending of tax fraud counts alleging he vastly underreported income he’d made distributing “sweepstakes” gaming machines for a company with ties to …