How to prevent wintrading ban [THEORY]

[ev0]

I'm noticing a pattern with wintraders who are confirmed getting banned, and not banned.

I had my friend (who i know wintraded), join a random BG queue. Within the hour he got a 72 hr ban.

Also, the people who are banned on stream last night, got banned within minutes after they zoned into a RBG.

I think the bans are going out based on queueing up for bgs/rbgs?

[gippy]

Weird system if so, would explain why there's still inactive characters on the ladders though (naked or in greens probably used for trading then dumped)

Haven't touched the character i got 2.6k on and i've received nothing yet