The author makes some very good points, but a lot of poker strategy which fuels negative connotations against calling rather than folding or raising isn't meant for the situations he's describing.
The problem with most "calling stations" is their inability to extract as much money from the table when they have the best hand, and the fact that they're prone to make "crying calls" even when they're beaten. This is NOT calling pre-flop with pocket 10s in order to try and outplay your opponent post-flop -- most novice poker players, calliing station or not, do not think this much about the hand.
Most calling stations will call that raise with their pocket tens, and proceed to call a bet with a flop of A-9-8, "just in case" he doesn't have an ace and is bluffing. They don't raise to try and see if he's bluffing and steal the pot -- they dont' simply fold and wait for a better opportunity --- they just call, which can do one of three things:
1) Put dead money into the pot, as they are already beaten.
2) Allow their opponent with a hand like KQ (on a A98 flop) to catch a better hand on the turn and river, rather than raising and forcing them out
3) Win the pot without extracting as much money as they could have.
In addition to #1, a solid player who is very observant could note this problem, and simply NOT BLUFF against the calling station, essentially providing him with a winner everytime he goes to a showdown.
THESE are the bigger problems with constantly calling bets --- not the ones the author described.
Still a good article though.