I've personally rejected at least 3 attempts at vandalizing a specific question - "is there a plugin for photoshop that lets me write right to left text" , for example this.
What's the proper way to handle it? I've made sure people are aware of it through chat and here. What else could we do? Hopefully common sense would result in these edits being rejected, and/or rolled back even if it did, but is there anything else we can do?