Having flown now close to 20 years, I've had one experience in the sim that would qualify as certainly extremely unpleasant but not quite harassment. Having the misfortune to previously flown a bigger aircraft the the said instructor and that fact having come up, the atmosphere created by the instructor from there on was downright nasty. Without going to the details the ex Ansett -89 scab made the two days feel so bad that still after close to six years I remember it vividly. Still one must bear in mind that everyone has bad days but not that bad two days in a row.