Most men don't have access to black list. I don't know if I am or not. It can be a tool and a weapon but I don't know.

Would a guy know if he was blacklisted? Is  there a notification sent?

It makes sense that there's more blacklists then whitelists since people are more prone to speaking out about negative experiences and in our business it can be a matter of safety.
It's just unfortunate there so many blacklists that are pretty much scams trying to take advantage of people fearing for their safety. Then there is the girls the blacklist too easily or for personal reasons.
Then when it comes down to it how many girls actually check the blacklist or listen to it?  
The one client I blacklisted who was stalking me for months, I had voicemails and texts with threats for my safety and when a girl contacted me about him and I told her she said oh well it won't happen to me and saw him anyway.  
I see guy stressing over getting blacklisted and I wish it actually meant something. It would be nice if people actually had an incentive to treat people right even though they shouldn't need one