For packages with many votes this is somewhat fine, but you should still skim the PKGBUILD as the maintainers of even popular packages may change in time.
I'd recommend checking both PKGBUILD and clicking "View Changes" to see who (and what) the last few authors have been up to.
It's relatively common for people to be added as co-maintainers after posting even just one helpful comment (!) in an unpopular package, so it's worth double-checking to make sure a big change hasn't been made recently without the author's permission.
It's relatively common for people to be added as co-maintainers after posting even just one helpful comment (!) in an unpopular package, so it's worth double-checking to make sure a big change hasn't been made recently without the author's permission.