why is it illegal?

Dressing up as that particular criminal is not illegal. It's merely infantile.
The phrase "get a life" seems useful here.

You wouldn't be the only person around here to make up "facts". Just do it and see if anyone gets annoyed.

Deja vu of this sort could be some kind of mediocre take on performance art translated into the forum/digital world.

If your earnest jmars then you'll footnote your vague claim ...

with the appropriate primary sources of that alleged claim: links, direct quotes, and more links please.

An elaboration on your irritating obsessive thread behavior will also be nice.

Hmmm...the goal of "attention seeking" seems to have been successful.