Why would it be dangerous ? Lot's of people go back and answer old questions and such. Not that it does a lot of good but there's nothing wrong with it !
Dear Answerer Omega,
Our of curiosity I went into some old questions, and learned the site changed in March 2013...this is from Yo Kass, his title was Community Manager, maybe still is...
"The "old" Blurtit became the "latest" version of Blurtit in March 2013. The site was redesigned to give a less cluttered and more easy to navigate site.... It's helping us keep the number of fake marketing profiles and spammers down...Our aim is to create a friendly and helpful Q&A community where people share knowledge, connect with others, and have fun."
So now when I see questions before March 2013, I will look more closely!
Thats funny