Voting on Area51 is very biased
Showing the yes-nos is bias. They should be hidden for an unbiased result. (In Area51)
Showing it probably does influence subsequent voters, but that's not entirely a negative.
Sure, if those voters blindly fall in line, that's a bad thing.
On the other hand, if all 604 of the votes on a question are in favor of something you were about vote down, or flag as offensive, those votes may help you second guess yourself long enough to read further into the comments and realize that a "woodcock" is a totally legitimate thing to ask about on the Birds StackExchange.
Individuals in smart, analytical communities benefit from the additional information provided by the rest of the hive, just as long as they don't lose sight of the fact that sometimes, rarely, everyone else is wrong.