I don't ship them but pple can ship whoever they want can't they? Personally, I like Robin and Steve's dynamic and friendship the way it is in the show and I don't ship them romantically. But pple ship whoever they want, canon or not. Now, if they believe that Robin and Steve are romantically interested in each other and are forcing others to believe them, then that's kinda problematic. But if they just want to ship them, then let them.