Well there was this one time while I was in the Brony Analysis group, this sad excuse for a human being recorded our private Skype calls, harassed our members, made slander accounts, AND deleted content on a shared Google Drive we used for collaboration. This same individual is still trying to "Bring down the Analysis Community" simply because we kicked him out of our Skype group for causing nothing but trouble. End of the day, we just try to ignore him; as it is he buries his own reputation by posting things to his twitter accounts, typically either misogynistic comments or the examples listed above.
Other than that, can't say as I've had any horrible experiences like Cat-fishing or anything