IP address ban/safe gold transfer

[theoryaction]

First off, I've read many of the botting guides on this forum, and I've gotten as much information as I possibly can without asking questions. After all the reading, there are still 2 questions regarding security.

Since Blizzard tracks IP addresses, will they ban my main account if my botting account is banned, and on the same IP address?

I've contacted a few gold buyer websites and they all do guild bank transfers, where I create a deletable toon, and then I get invited to a guild and deposit the money in their bank. It looks like they've been doing this for years, so hasn't Blizzard created a way to track this reliably? Is there a better way to do trades?

[RockDon99]

I've only done Face to Face trades when selling. Much less suspicious if you ask me-- as big trades happen more frequently there than in an inactive guild filled with level 1s.