What you advised was dumb
This specifically
"
If dude was really with the bullshyt, then he would have followed through with his threat.
Do you really think he would risk going to prison for the rest of his life over you?
"

Does the OP have a gun?
Just because someone with a gun didn't use it before doesn't mean they won't in the future
That is underestimating
Making someone underestimate someone with a gun, and they are unarmed

OP's guard should be up
Once again, what I said was the truth. nikkas with the bullshyt walk the walk, not talk the talk.
I never said that OP shouldn't have his guard up. Everyone should have their head on a swivel, but they also should not live in fear.
I wanna give you the benefit of the doubt that you have a lil education behind you and some sense, but your so called argument makes no sense!
My advice was to get security involved, which is smart. OP is at work. He don't need to say anything to that dude.
What we gonna do is agree to disagree on this one. I have contacted quite a few married women via phone text as well as social media and none of their husbands ever came at me on some weak insecure bullshyt. Like OP said, the interactions is/was work related end I am glad my lady co workers husbands understood that.