I believe there are measures in place to prevent that.
Well, in some browsers it would be a little obvious. I think the current version of Internet Explorer always show non-Basic Latin characters with Percent-encoding
on the status bar when you move the mouse over the link (even though URLs when copied from the URL bar are copied with Unicode in IE, when Firefox copies
them with percent-encoding).
the Cyrillic <а>, <е>, <о> look exactly like Latin <a>, <e>, <o>, as well as the usual graphemes for /s/ and /r/: <с>, <р>.
That's what I used to get past censors on certain forums.
Me too, as well as MM online games when I used to play those things.
One nice example is [url=http://www.☺.com/]☺.com[/url] (U+263A WHITE SMILING FACE
dot com). For instance, what do you see in the status bar when you pass the mouse over?EDIT: It seems the forum won't accept the link without percent encoding, hmm... However I don't know how to do the convertion, and unfortunately the site is redirected to another one so can't copy the URL off Firefox either. But try pasting in the URL bar anyway.