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Yes - reminds me of how several users would exploit the Bolt.com chat system (back in the day) using upper-case 'I's as lower case 'L's to pose as different users and cause mayhem.

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In the old days, I tried once to put a backtick ` on my username in counter-strike as a way to prevent admins from kicking me :P (the backtick toggles the console, and kicking requires typing 'kick <name>' from the console).

I was kicked within 2 seconds from joining the server.

I run a tf2 server, and we can just type /kick na`me in chat to kick you. (tf2 is like cs is that ` is console)

In systems that allow spaces in the middle of your username, there are some that do the same with the various unicode variations on white space. That's confusing even to people who know what to look for.

I have thought someone should compile a mapping of all the visually similar characters in Unicode to one canonical character. Then we can all include a check for potential impersonation in account-creation code.

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