[plt-scheme] Hygienic Macros

Hi all,

What would be a good simple example of an hygienic macro that would
not work as expected if the macro were not hygienic?
I would like an example that would be simple to understand to
programming language students that are non-schemers. All the ones I
have found from papers don't seem 'simple' enough.

Any suggestions?

-- 
Paulo Jorge Matos - pocmatos at gmail.com
Webpage: http://www.personal.soton.ac.uk/pocm