How do i mute?

[blackbullet5]

I recently have became a Admin on a form, and there is a spammer, the owner has asked me to mute because he dosn't know how, and i don't. can any one help?

[aldo]

Members > The spammers profile > Issue a Warning, though personally I have never used it, once you get it to 60% they cannot post...

[Rumbaar]

Please don't duplicate post the same support questions.  It just unnecessarily adds to the number of support threads we have to go through:
How do i mute?