Since the DUmmies are incapable of telling the truth, either 'at all' or in a comprehensible and direct way even when trying their best, you have to read between the lines. She did not say it was posted in a thread, she said 'Someone online,' which means whatever passed between her and her secret admirer was most likely in one or more PMs, or in other words, PMs to a PMSer. And 'threat' was likely not a direct threat to do something criminal, but far more probably something in the form of a fantasy that someone sent her in the 'I'd like to...' dirty fantasy vein, with some BDSM or dominance/submission elements, which she spun up into a red alert abduction warning for attention value.
Even if it were as represented (Fat chance, this is a DUmmie cum laude we are discussing, and therefore constitutionally unable to tell a direct truth), it could easily be some DU male or dyke thinking it was hitting on her, or one of the other Klams in a dispute with her who purposely adopted a male persona to troll her.