I’m getting to this late, Marley has said what I was going to say. But for any other readers who are not certain, please check the RULES: http://boards.straightdope.com/sdmb/showthread.php?p=7697048#post7697048
Basically, using quote tags means you are quoting. The only modifications within quote tags are standard editing (leaving out words marked by …, adding explanatory comments in square brackets, etc.) such as would be used in a research paper.
If you want to misquote and distort, use quotation marks, not quote tags.