It's fairly difficult to establish criminal levels of defamation. A recent high profile case in Sweden seems to establish that persecuting a man, acquitted by

It's fairly difficult to establish criminal levels of defamation. A recent high profile case in Sweden seems to establish that persecuting a man, acquitted by court, with continued accusations of sexual assault, through wide-audience Twitter and similar, as well as a number of moderately large audience paper publications, qualifies. (For context: in the social environment in question the consequences effectively destroy the target's livelihood as well as severely impairing his social life) But getting to near the end of that one took about five years of process, so I guess it can't have been firmly in obvious territory.