[PragmaticPulp]

I've been on the other side of this (threat analysis, not Facebook).

Known VPN-associated IP addresses were far more likely to be associated with abuse than average. Not just a little bit, but approaching 2 orders of magnitude worse in our case. It's not even close.

It's too bad for the people who need to use public VPN services for whatever reason, but until we have perfect bot/abuse detection, banning VPN, Tor, and proxy services is far and away the most effective tool for cutting down on abuse.

[thesz]

One of the VPN services I've used had their own IP addresses blacklisted - I was unable to view their list of servers while using their VPN.

When asked, they cited possible abuse as a reason. But whitelisted them again after a while.

[londons_explore]

But it's hard to 'abuse' reading a blog post...

[danuker]

There's denial of service, which wastes server resources, reducing the accessibility to humans interested in the content.

[Dylan16807]

I'd think that your average VPN block could just be rate limited if that's a big worry.