Question Is this safe???

Dec 6, 2020
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so I'm sort of not super versed in all this, and I just moved from the case my pre-built came in to a new one since the old one didn't have any intake fans, just one tiny exhaust fan, so when I found out that while the new one (a lian li lancool mesh 2) came with 3 big intake fans and no exhaust, I figured I'd just use the exhaust for the old case. Well its a tiny fan and didn't fit into the mounting holes, and so at the moment I just tied it onto the grates with a shoestring, and im only just now realizing that I'm not sure if that's a fire hazard or not? should I be worried? I would post a picture but I'm stuck on mobile atm until I can get some longer sata cables and the imgur app is busted so I can't make a link for the image which seems to be the only way this website lets you send pictures.