Good day, today I noticed that when you log on to the server, the server sends the client a list of all groups on the server (query groups, group templates)
Click image for larger version. 

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ID:	17010
Code:
sgid=3 name=Server\sAdmin type=0 iconid=300 savedb=1 sortid=100002 namemode=0 n_modifyp=75 n_member_addp=75 n_member_removep=75
sgid=4 name=Normal type=0 iconid=0 savedb=1 sortid=100003 namemode=0 n_modifyp=75 n_member_addp=60 n_member_removep=60
sgid=5 name=Guest type=0 iconid=0 savedb=0 sortid=100004 namemode=0 n_modifyp=75 n_member_addp=0 n_member_removep=0
there's nothing wrong with that, but still.

Also...

Guests see all actions query users without any permissions...
Code:
notifycliententerview cfid=0 ctid=1 reasonid=0 clid=21 client_unique_identifier=ServerQuery client_nickname=Unknown\sfrom\s108.61.78.149:54906 client_input_muted=0 client_output_muted=0 client_outputonly_muted=0 client_input_hardware=0 client_output_hardware=0 client_meta_data client_is_recording=0 client_database_id=100000 client_channel_group_id=8 client_servergroups=1,8 client_away=0 client_away_message client_type=1 client_flag_avatar client_talk_power=-1 client_talk_request=0 client_talk_request_msg client_description client_is_talker=0 client_is_priority_speaker=0 client_unread_messages=0 client_nickname_phonetic client_needed_serverquery_view_power=0 client_icon_id=0 client_is_channel_commander=0 client_country=US client_channel_group_inherited_channel_id=1 client_badges client_myteamspeak_id client_integrations

notifyclientupdated clid=21 client_nickname=GameTracker

notifyclientleftview cfid=1 ctid=0 reasonid=3 reasonmsg=connection\slost clid=21
list permissions on user
Code:
b_channel_create_temporary                             1   0   0
b_channel_create_with_password                         1   0   0
b_channel_create_modify_with_codec_speex8              1   0   0
b_channel_create_modify_with_codec_speex16             1   0   0
b_channel_create_modify_with_codec_speex32             1   0   0
b_channel_create_modify_with_codec_opusvoice           1   0   0
i_channel_create_modify_with_codec_maxquality          10  0   0
i_channel_create_modify_with_codec_latency_factor_min  1   0   0
b_channel_create_with_maxclients                       1   0   0
b_channel_create_with_needed_talk_power                1   0   0
b_channel_create_modify_with_force_password            1   0   0
i_channel_create_modify_with_temp_delete_delay         600 0   0
b_channel_join_permanent                               1   0   0
b_channel_join_semi_permanent                          1   0   0
b_channel_join_temporary                               1   0   0
i_channel_join_power                                   20  0   0
i_channel_subscribe_power                              20  0   0
i_channel_description_view_power                       20  0   0
i_channel_max_depth                                    0   0   0
i_group_needed_modify_power                            75  0   0
i_icon_id                                              1016814685  0   0
b_group_is_permanent                                   1   0   0
i_group_sort_id                                        35  0   0
i_client_needed_kick_from_server_power                 20  0   0
i_client_needed_kick_from_channel_power                20  0   0
i_client_needed_ban_power                              100 0   0
i_client_needed_move_power                             20  0   0
i_client_needed_private_textmessage_power              30  0   0
b_client_channel_textmessage_send                      1   0   0
i_client_talk_power                                    20  0   0
i_client_needed_poke_power                             30  0   0
i_client_needed_whisper_power                          100 0   0
i_client_max_clones_uid                                0   0   0
i_client_max_avatar_filesize                           200000  0   0
i_client_max_channel_subscriptions                     -1  0   0
b_client_request_talker                                1   0   0
i_ft_file_download_power                               20  0   0
i_ft_file_browse_power                                 20  0   0
i_ft_quota_mb_download_per_client                      -1  0   0
i_ft_quota_mb_upload_per_client                        -1  0   0