DX Wombat,
But there's one big, big difference - you're not 16. And I suspect that a lot of the comments stem from jealousy, that someone of that age has the opportunity to learn to fly. Understandable, perhaps, but not an excuse.
If I find myself getting jealous of others in that way I remind myself that ALL of us who fly are extremely privileged and very lucky.
Of course, another alternative if someone rubs you up the wrong way, for whatever reason, is not to read their posts.