I'd be careful about assumptions. Just because it only takes one abusive man to make every woman in an office miserable doesn't mean that the problem is always so easy to confine. Consider how that person got hired or promoted. Consider which men might have known about this behavior but done/said nothing to fix it. Perhaps more salient to this particular discussion, consider how social mores in the entrepreneurial community, where power relations are generally not as formalized as they are in a workplace, might stop or permit such behavior.