It's arguably the easiest way to scam on jsp, without anything being done.
It's incredibly irritating when people ask you, I'm sure we have all been asked at least once by some unknown.
Everyone knows it's taboo on jsp, and they should hand out a warning, if not increase your warn bar.
I can understand why jsp doesn't support this, because the S/A forums would be filled if they did.
This being said, I feel it would stop alot of potential scams that new jsp users would fall victim to.