I started my team of 3 at the end of Jan and they are now lvl 62 and I haven't heard from a single GM. I also haven't gotten a single harassing whisper about being reported. I've had a handful of people notice that my toons are in sync (like when we all mount up) and ask me questions but no one has been hostile towards me yet.

I'm on a PvE server and at this point only use my team for "good" so I don't expect many people mind. I try not to steal mobs at all (don't need to give them a reason to hate my team) and if I do by mistake I always apologize and offer to help them get what they need.

I also don't think many people instantly think "multi-boxer" when they see my toons since they are all different classes and not a full party of 5.

It'll be interesting to see if this trend continues throughout Outlands which is much more populated than the areas I leveled in.