Have you been on social media? A lot of ppl acting up participating in racism, transphobia, hate speech etc. do not give a shit about protecting their identity. If the real name is not already on their profile, then their post makes them easily identifiable.

Also, there are enough laws out there that force social media providers to give out information about the users who do illegal stuff online. That would make almost everyone identifiable.

The reality is that law enforcment gives a shit about doing their job. And Social Media providers give a shit about actively protect users of those points, even tho they are obliged to in many jurisdictions.