Malicious domains, like phishing and malware, can sometimes make their way into Kagi search results. I think it would be beneficial for Kagi to automatically check search results against VirusTotal, and mark results that have been reported as being malicious. This would help users avoid phishing.
While the checking would happen automatically on the backend, users should be given a clearly visible warning icon next to results that have been reported. This would be somewhat similar to domains with many ads/trackers (yellow shield outline) or surveillance technology providers (Surveillance Watch icon). I don't think the flagged results should be removed, since there is always the risk of a false positive, but possibly downranked like tracker-riddled sites.
For example, the second result of a search for "kamino finance" is a phishing domain: 
The red shield (as I have expertly drawn) indicates that this site has been flagged by VirusTotal: 