Is there a way to make vaping NOT look silly?
Yes, just do it, and do it for yourself. Don't go looking for an audience to proclaim how cool you are because that happens to be the exact most uncool thing to do :). Especially if you vape to give up smoking, you can feel confident that you're doing the right thing for both you and the people that care about you and that's the most important thing of all.
The rest, well, they don't really matter and they know it - that's why they try to have influence. Tip from my evil side: there's nothing that irritates bullies and wannabes more than being ignored, so enjoy that :).