That’s the theory of Gennette Cordova, who received the lewd photo:

Cordova is one of 198 people, many of them young, beautiful women, whom Weiner follows on Twitter.
Until recently, the congressman also followed stripper and porn actress Ginger Lee, 28, who openly gushes about her “Mr. Sexy Congressman” on social-network sites.
“Her name is Ginger — it makes sense he might have mixed us up,” Cordova said, noting that two of the first three letters of their names are the same.
Weiner has admitted he sent Lee at least one private Twitter message, but has declined to reveal the content and claims they’ve never met.
Cordova says she doesn’t know Weiner personally, but became a fan after seeing him on television.
She called the scandal — fueled by days of Weiner’s snarky sidestepping on whether it’s his equipment in the shot — “an eye-opening experience.”
“Everyone’s [writing] that I backed [Weiner’s] contention that there was a hacking,” she said. “But I never mentioned anything about a hacking.”

This actually makes sense, no?