Unless you know and trust everyone on your server (who can see both your in game name and linkshell name), that argument is a chromosome short of normal. You're infinitely more likely to pick up a stalker from your own server, and they already have all the information (and more) that you could get from the system SE is proposing.

Now, with exactly what I've said in mind, try and think about why this information would necessarily not make the system any less secure. Hint: Look at paragraph 1 again, but replace "stalk" with "hack"

You're making public information . . . more public? Don't be idiots. There's essentially no risk involved.