i dont know the context...but i can only imagine it was some over zealous dude trying to make a point to either get the author to notice. or to prove to himself that he is a righteous flag wielding steemian protecting the steemosphere.
on a seperate note. click this link if you want to see how people see if you voted or not and what % of the vote a person gave you.
https://steemworld.org/@sukhasanasister

there are several useful realities of this link. at the bottom of the page there is way to upvote through it....you can reduce the percent of your upvote too...thus allowing you to upvote more without draining your vote power. this is useful to those who dont have the 500 steem it takes to get the slider % bar.
there is another useful tool that is a plug in called tampermonkey ... this in combination with an app called steemchillers provides you with a favorites section which pops right up on the left of you steemit page. here you can put all you favorite folks for easy access. it has another section that you can tag posts you want to come back to for reading or later upvotes. this tool was a game changer for me.... it really reduces my wasted time of searching and trying to remember folks i dont want to forget or just want easy quick access to.
here is a link of how to get the plug in
https://steemit.com/steemit/@steemchiller/new-version-of-the-sct-for-steemit-released