In forums I see more and more questions that use JSFiddle or JS Bin to share live examples.
Are these links safe?
Would it be possible that somebody includes malicious code in a public JSFiddle or JS Bin page?
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It is possible that someone may include code in a jsFiddle that is executed when you click the link. By using commonly known codes for crashing certain browsers they maybe able to crash your browser.
Someone could send you into popup hell or down a link path that is hard to escape or lock your browser with processor intensive operations.
In general these are very unlikely and will likely not cause an permanent damage to your machine.