If you query a system there is little you can do to prevent them from taking that search data. Also it would likely not have any effect on your browser, unless your browser is trying to autofill or you have a proprietary app/widget/plugin trying to collect or process data. For example an ad blocker can take a little longer because it will analyze code and determine whether to block it.

Also just about everything you do online is tracked to some degree and made into money. Craigslist would not be any different.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth