I think the requirement for a presumption of innocence just applies to juries. Ordinary citizens can think and say and presume what they like.
I agree that this line is crossed all the time these days and the public seems to favor those newscasters who add smirking opinion to all their reporting.
What we do still have are laws against libel and slander. I was very happy to see Nick Sandmann, the Catholic school student who was pilloried by the press for supposedly disrespecting a Native American elder, settled his suits against CNN, ABC and the Washington Post. A federal judge did dismiss some of the suits but others were settled for undisclosed amounts.
What amazed me when it happened was that an ordinary person could go to YouTube, watch the full incident on video and see that the sixteen year-old kid had not approached the man, blocked his way, or been disrespectful at all, in fact the kid was trying to stand politely in an embarrassing situation while the older man tried to intimidate him. Clearly the people reporting the news, some of whom interviewed the kid with obvious malice and disdain, had never watched the video. "Reporting," has become so easy with the help of everyone's cell phones, but the professionals don't even take the time to watch what's easily available.