As far as I know the most you could accuse her of doing is transforming Winry into a possessive whiny person unable to wait to get what she wants and who emotionally abuses whoever is paired with her (granted it has only been one character officially so far). Also makes her an hypocrite and fails to see why someone would think all of that about her "perfect Winry".

So basically nothing too bad as she's easy to ignore since she rarely tags outside her circle and no one forces anyone to read her character's threads. Though I think that she's a jerk OOCly as I've heard some people complaining about how she ignores anyone's preferences/wishes if they go against what she wants to do with her character and force her way to get it.