I decided to see if nesting or prepending it multiple times would work:
"(re(re))" produces ")", so nesting doesn't work.
However, "(re)(re)" produces "(re)", so it seems you can slip it through just by prepending "(re)" to the message.
So if this was supposed to filter something, it's pretty easy to get past. If I just knew what they were trying to filter, this would be more interesting. :)
"(re)" causes the page to hang
"(re)bleh" results in "bleh"
I decided to see if nesting or prepending it multiple times would work:
"(re(re))" produces ")", so nesting doesn't work.
However, "(re)(re)" produces "(re)", so it seems you can slip it through just by prepending "(re)" to the message.
So if this was supposed to filter something, it's pretty easy to get past. If I just knew what they were trying to filter, this would be more interesting. :)