Noticed this bit in the AD&D Players Handbook (pg. 40) on clerics getting their spells:
Note that the cleric might well be judged by his or her deity at such time, as the clerk must supplicate the deity for the granting of these spells. While the deity may grant such spells full willingly, a deed, or sacrifice, atonement or abasement may be required. The deity might also ignore a specific spell request and give the cleric some other spell (or none at all). Your Dungeon Master will handle this considering a cleric’s alignment and faithfulness to it and his or her deity. [emphasis Kilgore’s]
I’m sure I’ve read that passage many times before, but I sure don’t remember it. We knew that clerics were required to remain in good standing with their patron deity, but I don’t ever recall the DM simply ruling that spells weren’t granted. As for clerics taking too many cure light wounds spells, here’s the solution, I guess.