You can use a public command by saying the following things on a channel:

• DF Command
• BOTNAME Command
• !Command

Command	Description	Flags Required
blackmark	Chlimit/remove/get blackmark information. Syntax: blackmark [chlimit/remove/del/clear/info/view] #chan [limit]	A
blackmarks	Chlimit/remove/get blackmark information. Syntax: blackmark [chlimit/remove/del/clear/info/view] #chan [limit]	A