It could be your replying to the eBay emails. There seems to be a cult following on this idea that eBay has cookies hidden within the emails that can log you IP... I'm not to sure about that, but I never messed with any of my past eBay accounts either. Try to stay as far away as you can from any of you suspended accounts.
Clean your cookies, passwords, delete any eBay software. Make 100% sure your IP address is different. Your IP address is the easiest way for eBay to track who you are and where you're from. Only use yahoo or gmail emails. Don't mess with any of your past eBay emails or even accounts for that matter. When an account of mine become suspended, I would just forget about that email, and simply create a new one. Don't risk it.
I'm guessing it's your IP address though.
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