The TikTok user had criticised Government support for the Chinese Community Leadership Course.
Netizens have urged local authorities to step in and take action against the man.
The man had approached the transgender woman to ask about her services, but wanted to "inspect" her genitalia first.
Prosecutions are rare as Italian law requires victims to appear in court, but most targets are tourists.
The speeding bus collided with another vehicle, struck the guardrails, and plunged off the cliff.
All lanes were cleared and reopened about an hour later.
One customer alleged that she was pressured into buying an S$11,000 package by the previous business.
Staff admitted a large rat had been spotted in the NICU, but no complaint was filed.
The suspect told the 51-year-old woman that she had been a victim of witchcraft.
Police have launched a search operation, but no trace of the youth has been found so far.