Quit busting on the guy. The issue isn't whether people will or will not leave messages. The issue is actually HAVING voicemail for his service. Unfortunately in Croatia, it seems they have to pay extra for voicemail, as well burn minutes to listen to voicemail.
It wasn't so long ago in the US that voicemail was an extra charge and it cost you minutes to check the voicemail from your cell device, and I recall many a user who didn't pay for it.
"Some see the glass as half-empty, some see the glass as half-full. I see the glass as too big." --George Carlin