This isn’t a problem with Lemmy, it’s a problem with clicking on links in general. Most top search engine results anymore are crappy content mills serving who knows what ad network ads that may contain who knows what malware. You’re probably way LESS likely, by an order of magnitude, to get something malicious from any given random Lemmy link than you are from any given random search engine result.

You can’t do due diligence on every link you click on. That’s absurd (at least for most people). The best thing you can do is make sure you have a reasonably hardened browser and reasonably secure operating system.

How hardened? How secure? Depends on your threat model.

most important is that you have an updated os, browser and adblocker. that alone will make browsing on “fishy” sites pretty safly.

never download or insert any credentials into sites you don’t trust. banking etc. only when you insert the url by yourself.

there was a time, where people posted links like this but i guess to many got rickrolled, so they stoped trusting those links. so it became more normal to just post the link like that duckduckgo.com

Never click links but if you must copy the hyper link and paste it into virustotal.com.

I use Firefox incognito with AdBlock and/or noscript and Firefox Focus on mobile to look at questionable links.