Computer froze the instant I posted A screenshot of Steemit on Facebook

It seems kind of fishy to me, just a few mintues ago I was talking to a friend on a public thread on Facebook who was new to cryptocurrency, telling him that he could earn for free on here to get involved with no risk. the moment i posted a screenshot in an explanation of the reward system my computer totally froze and force me to turn it completely off. Has anyone else had a similar experience?