New co-intel device: assuming the online identity of others

Today, I posted a comment on Breitbart, only to find that 10 minutes later, someone posted a reply to my comment, assuming my username!  I didn’t even realise that was possible.

So I wonder how many comments have been posted in my name that I have not written?  For that matter how many posts have been written in your name that you have not written?

Is this the start of a co-intel programme by the establishment?

Whatever the case, it could have serious implications if is allowed to continue.