I had that happen in Winterspring with a level 70 hunter. I saw him ride up, and knew he'd probably attack (at this gear level, a single multishot usually took out 2-3 of my shaman) I decided I wouldn't just roll over and die, so I spread formation and plunked down 16 totems. He ran within striking distance of me and dismounted, and then a staring contest started. I had him targetted and had my finger on the button ready to go while I watched him target each of my shaman in turn. To my surprise, he /laughed, /waved, and then went about his business.

A few days later I noticed a post on our realm forums about me had been updated, by the hunter. He talked about seeing me in Winterspring and said it was hilarious to see a little one-man army drop a forest of totems and stare him down. He was a good sport about it.