Vote lockdown (after some time): is it possible to revoke or soften?
Suppose I got an answer, checked it briefly and voted it up. But after some time (not 5-10 minutes, maybe days/weeks) I find that something in that answer is really wrong. Now I can't downvote nor cancel upvote. What to do (apart from writing a comment)?
For example, answers can offer easy way to solve problems, but with opening of some security vulnerability (not obvious for the answerer or most people trying and upvoting the answer), so "good at first sight, but bad in the long run" answers can gain votes that can't be revoked.