It's implied that it's your position because you argued using the article. Otherwise you're just helping the other by showing them the relevant part the article.
Imagine there was a discussion about a 911 conspiracy article and a person comments "Yeah but wouldn't the fuel burning collapse the building"
If I replied with a quote from the article
"..jet fuel doesn't burn at a high enough temperature to melt steel"
Wouldn't you think that's my view as well since the point of the comments are to express opinions about the article and situation?