From what I've gathered, the pigeon thing was based on he-say-she-say. Considering JP Morgan and many more never liked the man, I wouldn't be surprised that they wouldn't hesitate to fuck his public image.
Then again, /sci/ is filled with cocksuckers, who fly into a fit of rage once Tesla or anyone else's name is called, with a certain degree of accomplishment.
Keep in mind that the majority of his work was never released to the public. The least technical texts are only open to us. That alone should make one think.