[abridgett]

I wonder what systems the ISP has in place to avoid such networks becoming sthe source of DDoS attacks.

Given the generally dire security of home routers (and understandably low security of most home networks/users) it feels a little like giving people far more power than most can safely wield.

[tonfa]

It's a niche/small ISP, which mostly targets advanced users.

Though for regular users, they can get 10Gb/s for half the price of init7 with other isps (but probably worse peering as mentioned in the post).