The honoring of fictional characters by real-life cities is not without precedent. Philadelphia does have a statue of Rocky Balboa near the steps of the Philadelphia Museum of Art, which featured prominently in the movie's rousing training montage.
Detroit has no official stance on the RoboCop project, but it should perhaps be noted that most of the movie was shot in Texas.
"We're surprised at the amount of interest that's been received as a result of a tweet, a tweet that was a joke," Karen Dumas, a bemused-sounding spokeswoman for the mayor's office, told ABC News. "We understand that public art is important and we're certainly willing to honor the interest, but we do have rules and regulations that we have to adhere to. We just have to take this one step at a time."
As for "@ML," the Twitter user who inadvertently got the $50,000 ball rolling, he's from Massachusetts. "That Robocop thing was a joke run amok," he tweeted Wednesday. "I've never even been to the D."