alt Hacker NewsThey're trying to imply that fresh accounts might be used to steer opinions, IOW, they're trying to imply that you are a politically motivated kind of bot...
I agree, its a rather shady approach. But here you go, we'll get more and more of this, its a conveneient method to discredit discussion partners with unwanted opinions.
It's also a little bit more prevalent since after 5 or 6 comments you get soft-banned for hours, cannot have a decent discussion here anymore.