Just cause I like to put my opinion on topics like this, I would actually say to not add it...
Many people like to be alone, and with this command people could much easier find that person that want to be alone, so it is kinda breaking peoples privacy, but as Dope said, it isn't exactly easy to find Privacy on the interwebs most of the time.
If it isn't as powerful as it is on many other servers I seen this command one, which is like when you type the command you see all the players within 300 blocks or so, If this was gone be implemented on Noobs, I would say a radius of like 50 blocks or less would be fair.