First of all, congratulations on earning 3k! I'm very glad that you're motivated to cast close/reopen votes, we can always do with more curators on Stack Overflow.
I understand that it can be scary to feel that you might be targeted because of your curation. I won't deny that your name being on the close banner increases the chance that you will face some downvotes on your own content, but this is not as much of a problem as you might think.
To start, if a disgruntled user seeks "blood-soaked revenge by hitting on the downward arrow with enormous fury" as you put it, there is a script that runs every day that will reverse those votes, and you'll get the lost reputation back. If the votes don't get reverted for some reason, flag one of the downvoted posts for moderator attention and they can escalate it to the Community Managers, who can confirm if there was targeted voting and invalidate any outstanding downvotes.
Also, from my own experience, as well as discussing this with other curators, it's not just that you closed the post that causes revenge downvoting. Usually, it's the result of a comment thread that goes poorly, where you try to explain to a user why you voted to close their post and/or suggested how they should improve the post to get it reopened. If you want to reduce the chances that you'll be revenge downvoted, you could avoid commenting on the post at all. Ideally, you should comment on the post if you think you can help the user, but then disengage at the earliest sign of it going poorly. This is, of course, a fairly hard determination to make, and whether you will be able to do this well or not is something you'll have to find out for yourself.
Finally, hiding it from the banner serves to prevent downvoting a lot. Most users don't even know that the information about which users voted to close is available on the timeline.
I also think transparency is a good thing; I want that information to be available somehow, and the timeline itself should contain it. It might seem that there aren't any actionable things a user could do with that information, but users can raise custom flags based on that information. They can also ping a close voter if that user was the only one who participated in the closure (which would make them a gold tag badge holder, or a moderator). These are both actions that users at all privilege levels should be able to take.