My understanding is that +1s only affect your search results if you're connected to the person that's +1'ing. This makes ballot stuffing pointless. (edit: effect -> affect)
Google may also show aggregate +1's in their search results in the future (so social proof right in the search results):
>>And even if none of your friends are baristas or caffeine addicts, we may still show you how many people across the web have +1’d your local coffee shop.
http://googleblog.blogspot.com/2011/03/1s-right-recommendati...
>>For instance, your +1 could appear as part of an anonymous aggregated count of the people who have also +1’d the same thing
http://www.google.com/support/profiles/bin/static.py?hl=en&#...
Fifty ClickMob accounts on non-social sites are worth a lot more, for a short time you could totally dominate sites like HN, Slashdot and Reddit. But Google+ accounts that are not connected to relevant people, I just don't see the value...