it is useful, if you own a cut version of a game and then get your hands on a redeemable key with the same game, but uncut.

I think it's necessary for some gamers. For example, If they added a lot of free and f2p games to their libraries, now they can remove unwanted ones.
But if a hacker steals an account and decide to delete all games, how Valve want to deal with it?

Except that if ya remove F2P game from your library by normal means, it won't be listed.

You need to click on each game and go through dialog in order to delete it. It's a hassle to do that for every single game. Why would someone want to steal an account in order to empty it? He can legally make a new empty account if that's what he wants.

I'm asking myself this as well. Why would you care about what some schmuck thinks about what games you have on your steam list?

More choice is usually better, so we'll see how this turns out.

Or bury those bodies in the crawlspace!

I mean, I think that's what it would be like because obviously I wouldn't know.

To troll the victim and destroy his/her library.

If you have an unwanted game or an extra copy on your account (GOG or otherwise), you should contact support and let them sort it out for you.

Sticking a big red button to games on your account seems dangerously easy to abuse, make a mistake, and not to mention being a more tempting target:
"Some people just want to watch the world burn."
-Alfred

Edit: ok, it may not be that easy, but it is no less prone to abuse.

The exact reason Valve did this is because their support was flooded with these requests. Now the people can do it themselves.

How can you make a mistake? You need to open a browser, go to Steam, go to Support, click on Games, Software, etc., search the game, click on it, click on "I want to permanently delete this game", see the dialog where you are informed what you're about to do and you need to click again "Ok, remove the listed games from my account permanently". A lot of clicking in order to activate the "red button".

Even few days ago i saw people on Reddit requesting the removal of some games from their account. If it's something that people want, it should be there.

Yeeeeeeahhh...

*slowly backs away and head towards the phone*

There is always the possibility of regret, but highly unlikely to be a problem for most, so fair enough.

The major problem is people getting their accounts hacked games deleted.

For good god's love and divine grace! This ruined my plan for having gifted my old account to my nephew and sharing games, before! I have to warn him not to do anything crazy! But for crying out loud, i have an even younger niece! By the devil, i dread to imagine my former collection can just go *poof*, in a matter of seconds, should she toss her barbie and decide to click with that mouse and try to have a go at his pc...! Even though i gifted it already (and most games had been retail code redemption) (and that account had less than 10 games in total anyway)...