Hello Ruud,
If you are happy to run randomly downloaded binaries as root, then good luck! I agree that XyGrib (and ZyGrib before it and qtvlm and opencpn) are all great bits of software for sailors. The only one that requires you to run a binary to install is XyGrib. Of course, you think I'm being paranoid but its the opposite. I frankly don't care for me as I know unix well enough to be secure (indeed, I have built XyGrib from source and have modified it to read other sort-of-grib files that I use).
My concern is that making people happy to run random binaries as root is a very very bad idea indeed. Its totally unnecessary too, which is why I'm kicking up a fuss.