When those older Oakleys first came out they were in the class of the young and hip. As all things tend to do, styles and trends changed and now what is young and hip is completely different. Just consider it a generational thing like any other category - music, cars, etc. If they were in your era before, then they still are. No need to put em down or pack em up.
I suppose one could reason the one category you must evolve with would be fashion, namely clothes. And while I would agree on the whole (I have long since stopped dying my hair, wearing shredded jeans and obnoxiously adorned leather jackets), I don't think eyewear qualifies. Maybe I'm biased (yep!) but the shades get a pass. Will they look out of place if worn around normally? Sure, especially if they are a wild color. But I really don't think people notice all that much.
And like what was already said, you should wear what you want. We wouldn't be here collecting them if they didn't mean something on their own. It would be a shame NOT to wear them, at least once in a while, right?