Hi Karl,
Yes I know who you are talking about.
Three of the four identities stem from the same IP. He (they) just change their publically displayed name from time to time.
So, he (they) only get one vote.
You can't 'repeat' vote from a single log-in.
Also - when I get some of the 'odder' login names applying for registration - I check the ip addresses against others in the database.
The majority of people don't abuse the system. There are only one or two - and I've only deleted 3 posts (I think) in the last few years.
