Sala played 57 times in three seasons and I remember him as an awkward defender. He's good for the likes of Sampdoria but certainly nowhere near the level of Maldini. True, the other players I listed only played a handful of games, but Roque Junior was a pretty overrated defender, too.
Sure, Maldini is probably overrated, but one can say that about practically every good player out there. I can make a list of some favorites right now: Beckham, Owen, Totti, Ferdinand, Lucio, Casillas, the usual suspects in the Premiership, et cetera. But the same can be said by those who despise our team in Del Piero, Camoranesi, Trezeguet, Chiellini and others. So what's the point? This is pretty redundant.
Of course some little punk is going to say Maldini is the greatest defender ever. He probably thinks Beckham is the greatest winger ever, too, which I've seen/heard before.
Feed them enough crap and it eventually comes out of one of two ends.