Well, with play-by-post, it's inherently so slow that there has to be<em>some</em>rush.  But puppetting someone else's character like that's definitely way out of line.  And having at least some connections laid out from the start is generally helpful (though the benefactor method works about as well with less work).  But every character graduating from the James T. Kirk school of self-expression<em>is</em>a bit much.