Looking is not always sufficient, there can be embedded subshells, newlines, etc. that’ll caise execution immediately. You need to inspect it in a separate program very carefully. Frankly, you probably shouldn’t ever copy and paste anything into a shell. Type it by hand. In a similar vein there are beautiful ways to hide malicious payloads in installer scripts (e.g. inspecting the user agent do it shows up as harmles when inspected in a browser) which are ever so popular with “hip” developer tools that can’t be arsed to go through the hassle of getting included in a distro properly, because releasing ten versions a day is “modern”…

Most modern terminals will show you the text before actually pasting, but this is good advice regardless.