I had about 12 domains once and decided to park them as I was busy, set them all up on adsense, went to all the domains to make sure they all worked, a couple I refreshed a few times as it wasn't working properly.

The next day I got an email saying my adsense was closed for 'fake views / clicks', no way to challenge it or anything.

That was like 10 years ago. I still can't use adsense to this day.