When I see a Supra, I am always very interested and if the car is very nice I look for opportunity to make contact. Unfortunately, rarely contact is made and the reason is that I am still driving my Porsche and the Supra is in the garage. However, the few Supra drivers I have acknowledged seemed extremely pleased by my interest.
If you ever owned a Porsche or driven one extensively, you would have found a great sense of community most evidently expressed by the expected hand wave of your unknown but fellow Porsche enthusiast. This simple acknowledgement makes owning a Porsche all the more worthwhile because you know that kindred spirits exists and are with you.
So my friends in the Supra world. I definitely encourage you to acknowledge your fellow Supra enthusiasts and owners. This is the best way you can say that being a part of the Supra community is special.