There are plenty of spells in the spell compendium/PHB II which don't make any sense unless you read the intro text.
There's also a spell which really doesn't do anything except exist. There's a 4th level spell, castable as an immediate action, which forces a caster to make a concentration check or lose a spell they're casting.
The problem is that any hostile spell will do the same thing to a caster, so any immediate action hostile spell will do this. It seems kind of weak to not make a whole spell devoted to distraction a little bit better.