Jeffrey has been known to share his almost nude pictures to kids, in women's apparel. I don't know how frequently but there were times he had been caught doing that, posting his pictures to streams frequented by the underaged.
He has been on ImgFlip since 2015 or 2016 and has since been prevented from commenting. He could only post memes.
There is a person who pretended to be him; that's probably the Alt spoken of on this stream. He would go and post Jeffrey pics to memers and followed streams. From what I've heard, he is actually not Jeffrey