I've only had a couple people over the years and the hate was minimal, the majority of people I interact with are pleasant with me. Retail is certainly fine with multiboxers for the most part.

I have even had people stand up for me. Very recently I was in a warfront and someone said "A multiboxer lets kick him" and someone else said "Why he's pulling his weight." and nobody kicked me. Same with all the group world quests, people see me helping and are OK with it. If I see someone soloing a rare I stop and help and they /wave or /thank.

I drop a bling6k then drop five bling5k so they fight and people are like WoW thats awesome. When I hearth I put on a show, spread my team out and use an assortment of the hearth toys and people are like Wow cool!!

If someone is mean and continues being mean I just put them on my ignore list, but currently there is nobody on it. I'm just not seeing the hate you see.