I don't vote unless I've had time to read the entire review. It does seem like there is some pressure to vote higher ranking reviewers EU most of the time. I do try to be honest. Sometimes, if I know someone tried, and it wasn't a great review, (but not horrible) I don't vote. I know, maybe that's silly, but everyone misses sometimes.
If it looks like a rush job, and not done well, I will vote honestly.
I try to give either constructive criticism, if the review was in any way lacking, or ask a question that I have, or make a comment on something in the review. I don't just say, "Good review." My vote will say that, if it was.
I feel I have to read the entire review, or I don't vote. Even the often said things, people sometimes give incorrect information, and IMO, people should be reading other reviews to KNOW that information. (I know I read all the product comments and information about materials before I started to write reviews.) Things like calling a silicone toy "rubber" or really poor cleaning directions, or comments that were not accurate about the toy or its functions it will reflect on their rating.