It is very tempting to click! I find myself doing it unconsciously sometimes and going back on it seems risky since it seems the world watches your every move. ognitive shortcuts is exactly right.
Data collection wise I don't think an upvote has a typefield where it contains the method of upvoting but maybe it should? I would be very interested to see this data.
I actually haven't ever upvoted anything without at least clicking in and looking at the post. But that isn't to say that I haven't skimmed post and upvoted them in a matter of 5 seconds. Not long enough to actually read the entire thing. Steemit is an interesting experiment in rewards. With the follow button it becomes a question of do I follow users that I like but aren't upvoted by whales or do I follow people that I don't care about their content and just upvote them because I know the whales will. It becomes an issue. Great post