Not sure but if one broke the rules and got banned then the ban would apply to everybody.

(+18)

I'm fairly sure that if the accounts team saw more than 18 accounts with the same family name from one address, postal I assume you mean, and all of them were making the minimum per month, meaning in excess of USD 1,800.00 per month, then an eyebrow or two would be raised...and that's putting it midly.

If you follow the T&S of AdSense, there is no reason for any problem. My wife and do exactly the same and are proud AdSense publishers with annual six figure income for 6 years.

Yeah when you start making any kind of money people really look at your site. The web spam team will also look at it. I have an old adsense account that was never banned but sites that used the ID got banned in the index pretty fast.

My wife once tried to apply for an account but adsense emailed back (those good days when we used to get personal emails from adsense), saying that two accounts on same address is NOT possible.

I don't know if they treat USA and Canada differently, because In India, they don't allow 2 accounts on same address.

I think tigger2 meant to say all members are older than 18. We've seen many occasions over the years that more than one account was accepted for different reasons.

It's possible but I wouldn't suggest it. If one of your family members gets banned, so will you.

when I said (+18) I meant we are all older than 18, so even if we have different websites for each of us still a ban for one of us means all gets banned ?