The paparazzi might have killed thier careers if that recording had been leaked at the wrong time. It was the 70's and many people did cocaine during that time. It was a socially acceptable drug. But the paparazzi would not kill them literally, as they are not the mafia, just photographers.
The Beatles were a uniquely talented set of musicians who chose their manager wisely. If they were around today they'd have enough common sense to employ people who would look after their interests and prevent press intrusion. They'd also know how to use the media to their advantage, to promote the image they want to project.
Although the paparazzi are no doubt annoying, they have not caused any lasting damage to the two remaining Beatles. If all four of the Beatles were still alive the circumstances would be similar to what they are right now. The paparazzi would follow each of the Beatles, photograph them, and generally be annoying, but no more.
This question is not very clear. If they're asking if the paparazzi would literally kill the Beatles today then no that is not possible. There are too many witnesses. If the question is asking if the paparazzi would figuratively kill the Beatles today then yes. There were many things that the Beatles did that no one knew about until years later all because the presence of paparazzi wasn't as intrusive as it is today.