Вопрос такой же: Почему мну в ru_politics забанили?)

..., und333, undertakerx, ungern88, unicoder, universant, unknown_guard, unknown_known, unnamed_86, unthankful, uplacheno_v, upwave, uqraina, ura_fight, ura_gan, ura_gun, uriel_666, urodina_com, urrsula, usachev_d, usama_ban_laden, uscy, user190892, user2718, usersss, ushakoff, ushastaia, ushastie_ezhi, ushel_v_kino, ushkuiniki, ussserge, ust75, ustes, usumasinta, usurero, utenok_mu, utkin_tlt, ...