ATers have nothing against car modding. Most of us in the garage forum here have modified our cars quite a bit, though you wouldn't know because we don't consider things like neon paint and graphics, HIDs, stereo systems, ipod adapters, and 22" wheels "mods". The majority of real car mods aren't "seen" by everybody, which is a negative detraction for 99% of people who seek to "mod" their cars.
This being a PC forum, where "mods" for 99% of people are considered to be carving and cutting your "gamer" alien face case and installing two dozen LED fans, glow in the dark SATA cables, and 15 blue LCDs on your keyboard on your Pentium 4-1.6 with onboard video. These things would be considered rice on a PC (regardless if the components are top of the line). But when you apply that same mentality to a car... ./facepalm.
Contrast with things like spending the money on actual hardware like CPU/GPU first, overclocking, water cooling, or tasteful mods that cleanly and professionally modify the case for fitment of aftermarket coolers, fix known problems from the manufacturer, add functionality, or JUST ENOUGH blue LEDS used sparingly (eg: two for the power and HDD lights) to accentuate the polished edges of the bare aluminum of the case. eg: mods that are tasteful or enhance performance or functionality or fix a flaw.
What we see a a lot in the garage are PC enthusiasts who have "modded" their PCs for years with LED fans, then come to garage as car newbies with zero car sense wanting to know how to do the same thing to mutilate their poor brand new car. Just take that itch out on your PC and enjoy your shiny new car for a little bit. In time you will know what you should or shouldn't do with it.
Even something like wheels and an exhaust on a Yaris might be considered rice by some, as someone buying a Yaris isn't/wasn't in the market for performance or style in the first place. Scions were at least marketed with the young aspiring "modder" in mind. But a Yaris... not so much.
That said, to each their own. It's your car/PC, do what you want with it.