Here, you want recognition? Here's how you do it:
#1 - Practice - practice - practice
#2 - After you're good, go get a Shark/X-Port so you can prove yourself
#3 - Go do some fast times
#4 - Post your replays
It's that simple man.
The excuse "I never thought to buy an X-Port/SharkPort" doesn't fly anymore. With so many great drivers around, a real driver can't be without one.
Drive clean, don't use hybrids/gamesharks. Is that so hard?
Driving clean - don't wallbang/wallride, keep 2 wheels on/above the track at all times. And above all, no wheelies.
I forgot another one, stick to the rules of any challenge. If the challenge states you use an arcade car, use it. If it says stock horsepower with T8 (Super Soft) tires, use that.
For GT2 there is a program to check things like this, it's only a matter of time for one to come out for GT3.
Until that program comes out, I tend to stay away from challenges that involve arcade cars, because it would be too easy for someone to cheat. Nevertheless, I've run a few, with replays available, and personally can't wait for that program, as it would be 99.9999% impossible to cheat.