The teleporting within objects is an Exploit. These are indeed bots and they have been rampant the past 10 days. They are farming vast quantities of Shards to sell to Crafters. You can tell all the bots in the bot-net by their first names or surnames that they share in common.

And you are right, this kind of thing will ruin an MMO. I played FFXI but not for long when I realized I may have been the only human actually playing in Bastok on my Server. When I walked out town and saw hundreds of fishing bots in a row, and dozens upon dozens of mining bots, I left the game immediately and never looked back.

You can (and probably should) report every one you find for Cheating. I know I do so but I have yet to see a single one get banned.