🤔 IMO they aren't forbidden, just off-topic. Most of the time they are allegations. Allegations are just that, allegations. Until a court has decided whether they are true or not, they should be taken as just that, allegations. It is undeniable that rape and assault allegations have more impact than most allegations.
If a court verdict were shared, then it would be much more substantial, but even then, to most people, they are of little impact. What do I care if some person I don't know is convicted or not convicted of a crime? It's hard enough to remember the names of all my cousins, let alone some stranger on the web.