[roadkillon101]

While "banning by ip" will work for discouraging most users, a VPN service or a Proxy service (Socks, ssh, etc) would make it irrelevant if someone wants to use a service like slack, facebook or google...It just inconveniences those who do want to use it bad enough. To me, it's a "band-aid of compliance" to whatever agency has requested them to do a ban on certain countries IPs.

[vharuck]

IANAL, but the legal standard is often "enough effort to show you tried, but it doesn't have to be perfect."

Which is usually taken as, "enough to inconvenience unintended targets, even if intended targets can easily avoid the punishment."