But more reasons to encourage others & yourself to dump twitter I guess
That is true of any free platform. The entire US is vulnerable to penetration because we have a free society. And many Democrats are making it worse by doing things like destroying our border security.
It is only logical to believe that anyone who really wanted to get in or on Twitter would be able to do so. Foreign or not. Besides; since Twitter and FB for that matter are globally accessible I am not sure that it is accurate to say that "foreign entities" are or have "penetrated" social media sites.