Guess i'm late to the party.
I get this a lot here in AZ, not so much people egging me on but people are so aggressive around me when I drive my Z. If i'm in my pathfinder everything seems normal. I feel like it's because of my exhaust, maybe when i'm accelerating from a stop, people think i'm trying to race but i'm not even trying obviously lol.
But yeah, people just seem more aggressive, always have to pass me, or accelerate faster, etc. I just ignore them and it ends up entertaining me.