Critique is a dangerous weapon. Its the easiest way to tear into the soul. Possibly making an interesting murder weapon. If you want to kill an artist ask questions like these:
Why did you choose to use only one canvass?
Do you think the use of those colours were effective and why?
Basicly asking questions over and over, rather than commenting on the work itself it the best method. And answer questions with questions.
"Did it answer YOUR question is the question?"
"He/She obviously knows nothing about art. This critique is over."
Yea man I think i just critiqued myself