I have a question for all you sweep experts out there. If me and my roommate have our own accounts should only one of us play? I know the rules state that one account per person but with these cheaters I don't know if we should both play since we have the same address and use the same comp. Maybe we should play alternate days?!
You are OK - it's 2x per person/per day, not HH/ISP.
As far as anyone cheating? It's the sponsors responsiblity to deal with them. It happens more often than you'd think, but at least eprize {which runs a majority of IW's, but not this one} is on the ball:
ePrize Launches First System to Block Fraudulent Entries in Online Marketing Promotions
http://www.prnewswire.com/cgi-bin/stories.pl?ACCT=109&STORY=/www/story/03-28-2005/0003285725&EDATE=