Questions about banned account and future accounts

So i had 2 "test" accounts that i was running in gundrak. Im going away this weekend but my plan was to run one of these 5man team in mop hc when i got home. And mean while i was away run the 2 "test accounts" i gundrak, however when i woke up this morning both the account was banned. So my questions now is. Is my computer/ip flagged? So that when i start the mop hc team will get banned just hours in? And what if i use my friends mastercard and ip to create the new accounts, will that work?

 

Come on guys

 

gundrak is a older way of getting gold easily.
this means that blizzard knows this and have already taken actions to prevent this from happening again.

I don't really recommend doing a 5 man running hc, because of the same reasons why you shouldn't be running gundrak it's a to well known method.

and I don't really think they will flag you IP. The thing that I noticed is when you are running more then 5 clients on the same pc you will get banned faster