Account suspension for deleted games.

It's against the rules to remove a game you've won - it's called "not activating your wins"
You add them back, and then see if you can get things sorted.

Also, is it for the account you're logged into right now, or another account? Because you're only allowed one account on SG as well.

Do you mean YOU removed them or Steam did? It's possible he had won games that were "revoked" by the Dev?

Good thing I read this. Was planning on deleting crappy games most of it i won here. I just wanna clean my steam library from crappy games.
Thank God saw this first

It's a pity that users can't delete won games, even after 5-10 years.
Some games look good, but in really they are crap.
Some games already completed and user didn't want to have on account anymore.
Priorities and interests change, people change.
There are many reasons...

Once activated games forever connected with account. Forever! User can remove or restore their any time (it's take couple of seconds).

During account synchronization (we have to make sync every week) SteamGifts can make a mark in database like "This user is clean, all wins are activated" and don't check old activation during next synchronizations.
To avoid an abuse it can be new rule "If all game activated, then user can remove from account games winning one year ago or earlier".