Huh. Turns out it's just common in the Philippines and sometimes in Latin America. I'm surprised it's not as widespresd considering the "white people love cheese" stereotype.
The instances I joined to are blessed with awesome admins and good filters. I only encountered a spam account once in a smaller instance. Since it's small, reporting got fast reponse from the admin.
Honestly, the spam problem seems to me like my average Twitter experience but with less porn.
At the very least, Google and Facebook have to step back if caught. Meanwhile, Chinese companies often don't care about EU privacy laws. Still avoid them altogether, any way.
Check out #deftones on Tiktok. REALLY horny.