This practice is called "doxxing," and is becoming more of a problem, especially since many people use the same username across all of their online services.
A na-akpọ omume a "doxxing," na-aghọwanye nsogbu, karịsịa ebe ọ bụ na ọtụtụ ndị na-eji otu aha njirimara ahụ dum na ọrụ ha niile n'Ịntanet.