Yes, but that one sure way to get denied entry.

Under Sec. 212 (8 U.S.C.1182) you are ineligible to receive visas and ineligible to be admitted to the United States if you 'voluntarily admit to having committed a crime involving moral turpitude

Here's a recent story: http://www.vancouversun.com/news/White+Rock+woman+barred+fro...