Does somebody know how karma (serendipity_event_karma) works? I was thinking, that karma places a cookie after voting to prevent multiple voting of the same person, but I have severe problems with voters who vote again and again. Maybe, the configured their browser to take the cookie first, but deletes them on closing? I also found several bots and crawlers, witch have voted.
What can I do? I don't think, there is a generally save approach to this problem. Is there any setting in karma to prevent voting from the same IP-adress?
I think about stopping to let my visitors vote but would like to have the possibility to vote by myself (once per article). Does anybody know a way to change to plugin to vote only for logged in users or a other plugin to solve this? I am going to set the max vote time to 1 as a first help.