i run 2-5 bots off the same computer, Two of them are the same real id, the rest are on separate since i bought them.
You're fine, because blizzard wont range ban your ip, What they would do if they cought one of your accounts is they look to see if any other accounts are on that same ip, and look for signs of botting/breaking toa.
IN OTHER WORDS: if one of your accounts gets banned, dont leave another on running for 12 hours a day, lay low for about a week.
Connected / not connected doesn't matter, they wont ban your wow2 for botting on wow1.
Personally, i prefer all of them not connected, but i do keep both connected and un connected accounts running about 18 hours a day on the same computer.