How Can I Use Multiple StumbleUpon Accounts?

I want to create multiple accounts without it being detected that they are all mine. I've got some strategies for keeping the mutually shared content down, but I need to figure out how to do this.

A proxy is obvious, but that's a lot of proxies. Is there a anonymous way I can utilize StumbleUpon in Chrome while doing my regular stuff in Firefox on my IP? I'm new to this "multiple account" game so I apologize for the nubbery.

I did not try to open multiple accounts in any social bookmarking sites still now. Even i prefer to increase credibility of signal account rather than opening multiple accounts in same sites.

Get a proxy switcher and clear cookies for each time you login or setup a new account.