Depends. If you know how to program Java, you can get quite a nice little mallbot going by just undoing the protection. But really, no.
Mafia won't tell you the mall price of the cheapest object in the mall, only the fifth cheapest (so you can't continually search for Mr. A items priced at 100 meat, etc.)
It also will censor the results of anything with "mall" in the address, i.e. mall.php, searchmall.php, so you can't manually try and search by parsing the HTML.