@Elliot404 Legal protection means applying legal methods against pirates. Taking down copies shared online for example.
Physical protection is using DRMs and other things to make piracy a tad difficult.
Essentially he is right. It's best to just use some sort of basic protection than to overprotect your game, because... DRMs in the end only hurt legitimate consumers. And that's to always remember. Nevertheless, while piracy is spoken to be bad, there's one thing many people forget about it.
It's free publicity. You don't have to pay anyone to share your pirated game and as such it may reach a wider audience and not just pirates. I said it once and will say it again. At first I started at Don Miguel's pirated RM2k3 in 2009. And as of now I have all copies of RM, legally purchased, and my investments in RM are at more than 300€. And it's not just that, I've purchased 30 or 40 games I wanted, but couldn't buy in past, but RM is the branch I've invested in the most.
Believe it or not, I'm not the only one who now goes to legitimately purchase games they couldn't buy 5 years ago. So for some companies my, and not just my piracy ended up even profitable. I got my hands on games I wouldn't even consider today as the market is evolving and as such they got themselves a customer.