This question already has an answer here:
This is a not duplicate; I am asking that this "feature" be removed.
This Q now has more votes than the previous request, thus making this one more valuable.
Pinging the name
@nick, in chat, also pings all users whose names start with "nick" (like my own).
Not only do I get pings while in the chatroom, I also receive notifications on my phone about new pings.
- NickDugger (me)
There are other cases of this happening as well, and sometimes with names not as common as above.
The importance of this feature was before there was auto-completion, which even mobile now has: http://i.imgur.com/dYwLA1N.png
Typing in the first few letters and using autocompletion will spell out their full username. This should be encouraged, and this short-name matching should be removed.
tldr; Pinging users with a shortened version of their name causes irritation and should be removed.