It is possible, I guess, that you told two close personal friends that you had made a comment on infosec.pub and then within two minutes they had both jumped on and upvoted your comment for you. And, also, one of those users who did that has multiple accounts under their same username on many instances and likes to upvote their own content as a regular feature of their participation.

Personally, I’m more inclined to believe that it’s all alts of you and you just like upvoting your own stuff. For one reason, all these close personal friend users all seem to display a lot of the same features of feeling super-passionate about it being important to talk down Bernie Sanders and how he’s a fake leftist and your superior credentials mean that you don’t support him and no one else on the left should either.

You know, a perfectly sensible political viewpoint, that a lot of close personal friends have.