Why can't anonymous users vote more than once from different browsers/machines?
105243
Does poll not allow multiple anonymous votes?
9834
Add a time limit before you can vote on a post
104814
'Daily vote limit reached' only for comments
31877
How to differ sessions in browser-tabs?
100205
Make it possible to prevent voting on time-limited questions in meta without a historical lock
130434
Are votes really anonymous?
12294
Why are users allowed to vote to delete/undelete multiple times?
128369
Some three-digit (incl. minus sign) vote count still doesn't display properly
153319
Can we do more to warn anonymous users away from invalid edit suggestions?
55401
How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?
136004
Can we get the UAC prompt to show only once?
114158
Anonymity of downvotes has a loophole
48384
Why are votes anonymous? Let's make with the transparency and have them publicly attributed
139208
Could there be a bit of reputation leakage between the sites, please?
69602
Why does Super User site appear twice in vote-to-close dialog?
156230
How to force users to re-authenticate on specific pages?
76457
Is down voting supposed to be anonymous?