Voting by user is against the rules of Stack Overflow; if you intend to upvote this user's posts in order to reward them, the votes will be reverted and you might face disciplinary action.
As a YouTuber, this has happened to me multiple times. It's fans or people trolling, they always remove the points though.
How would the platform distinguish those votes from regular ones?
As a network moderator, I actually know the answer to this, so I'm not going to openly speculate. Suffice to say, the rule is there for a reason (voting-by-user messes up the ordering of answers to each individual question), so please don't try a clever workaround just because you think you can.
Navigating to an answer from the user's page only "shadow votes" it for you, it doesn't get counted.