Edit: No, I don't socialize with the people at work. I have friends for that.
I think your advice is completely sensible for people who are a little more risk averse. Sad that such measures are necessary, but we all decide our acceptable level of risk.
(Advising people not to meet with anyone without a witness is not good management advice, for obvious reasons, but at least it's not unlawful).
Except you read it that way because you're biased to see bad faith and sexism everywhere. And look what happened: you uncharitably condemned and berated a fellow human being for literally no reason. And you're not even remotely apologetic for it. This pattern is sadly not at all exclusive to you, or uncommon.
As others have pointed out that this thread has gotten off-topic, I'll not be replying further. I'll merely suggest you learn from this mistake.
Did you also refuse to meet with men privately?