From Blizz Chat (I changed the CS Name to Blizz Customer Support since I wasn't sure about this sites rules on posting blizz communications)

Blizz Customer Support
at 17:53:21
Hello there, I'm Blizz Customer Support with Blizzard Customer Support and I'm looking over your request now. How are you doing today?

Peri Helion
at 17:54:14
I am well. I am looking to reactivate my account and begin multiboxing, but want to make sure this is still allowed before spending the money

Blizz Customer Support
at 17:54:43
Multiboxing has never been against the rules.

Peri Helion
at 17:55:45
I know /follow was removed from Battlegrounds, I just wanted to make sure

Blizz Customer Support
at 17:55:56
Yes /follow was removed but multiboxing hasn't been outlawed Peri Helion

Peri Helion
at 17:56:19
Great – if there was an addon that allows the follow function in Battlegrounds, would that be allowed?

Blizz Customer Support
at 17:56:28
That I won't speak to as I am not familar with that addon and I cannot guarantee using it will make you safe.

Blizz Customer Support
at 17:56:43
My guess is the developers will disable that addon though.

Peri Helion
at 17:57:38
ahh - understood - thank! I will not use it then

Blizz Customer Support
at 17:57:18
It was removed for many reasons to ensure that players were all participating in Battlegrounds.
So - less time than it takes to make a post, somewhat of an answer. Is it definitive? Nope. Is it indicative of what the CSRs are being trained to say, and therefore a factual insight into Blizzards potential stance on ANY attempt to bring /follow back into Battlegrounds? Each can read for themselves and decide.