Many websites now let you create a profile, form connections, and participate in discussions with other members of the site.
I think the ramifications of allowing the construction of digital identity almost completely separately from corporeal identity really does feel like one of the hallmarks of our current digital milieu. It makes me think about if there is an alternate digital formation that could have arisen where digital identity was tied to something like a state ID or driver's license, and the freedom (and perceived lack of consequences) of our current internet was different. Would online behavior have shifted? Would trolling or dogpiling have been less common? Would the anxiety and malaise tied to existing on social media have lessened, or increased?