Texas is a big state and I do a lot of driving.
They're mostly in my Accord or a rental and not the Z (although we've put 17K on the Z in 13 months
)
When I'm on a trip, my goal is to set cruise and stay away from all other drivers. I will speed up or slow down to avoid cruising with other cars ('cept for the convoy of course). In most of the cars this is not a problem. Occasionally someone will get pissed when I drop the Accord into 3rd at 55 mph and blow past them in a safe passing zone, and then I can't back off to my original cruise control speed without them tailgating my a$$. But it seems like any change in speed in the Z elicits a response from nearby drivers. If I slow down, they get next to me and match speed. If I speed up, they try to keep up. I often just look over at them and wave as I drop a gear and let off the gas.
I've gone from cruise control at 75 in the right hand lane to 4th gear to slow down to 55 then accelerated to 80 back to 55 to 80 back to 55 all without braking before accelerating back to 75 and setting cruise control just to get some stupid Pontiac G6 to back off my a$$. Seriously, I was in the right hand lane and passed him on cruise (and yes of course he was doing about 68 in a 65 in the left hand lane), and he immediately get over and starts tailgating? Ummm, NO...