I've heard of a concept of "criminal speeding" (e.g. going so fast they arrest you instead of give you a ticket) but it doesn't look like my state has such a law. However "Reckless Driving" seems to be much more lax and requires only "willful and wanton" disregard for the safety of others. $200 summary fine (again 2x in construction/posted areas).

Like most enforcement in the US, there seems to be a great deal of discretion in what the police officer can actually do to you, everything from a warning to a large ticket ($475 for my example w/ a reckless driving citation, which will also probably cause you to lose your car insurance).

As it should be. Penalties for speeding are way too lenient, and enforcement far too spotty.

Nah, you can do 100mph safely on the 407 all night. It's just straight, smooth, half-empty toll road.

Until the person in front of you isn't speeding and you rear end them.