Would Wikipedia have ignored the airplane until it was independently verified an explained by "professionals" who weren't smart enough to invent it in the first place?
No, it would have covered the airplane once it had been written up in two or three major newspapers (no, social link sites don't count, there needs to be a significant article written on the topic). Alternately, significant research papers from multiple, independent parties on the airplane specifically (not, say, Icarus's wings, or philosophical treatises on wouldn't it be nice to fly) would do well too. Etc.