Try being the guy who spent all his spell slots casting
Explosive Runes for a month or so, and then researched a level 2 version of Dispel Magic (like the one in NWN). BBEG time, chuck an entire backpack full of sheets of paper each with an Explosive Rune on it at the BBEG then cast Lesser Dispel Magic at minimal caster level. Now, read Explosive Runes again, particularly the part about what happens when you fail the dispel check.
Nice trick, it would have been a "clever use of game mechanic" - i.e. powergaming, not munchkinism, in my book- if it was possible.
It's like a more sofisticated version of the old bag-of-rats.
But it does not work, because
magic items are not affected by an area dispel.
"For each object within the area that is the target of one or more spells, you make dispel checks as with creatures. Magic items are not affected by an area dispel."
Each piece of paper is targeted by Explosive Runes.
Being a rules lawyer is an essential part of being a powergamer.
1:
Note: Magic traps such as explosive runes are hard to detect and disable.
2: Magic Traps
Dispel magic helps here. <...> This works only with a targeted dispel magic, not the area version.
That is a generic statement. When a spell explicitly says something else will affect it, then it supercedes the generic. This is especially obvious when it comes to things like
Feeblemind and the like, which are explicitly immune to Dispel Magic, despite the generic statement in Dispel Magic saying any spell can be so targeted. As a "rules lawyer", you should know this.
But nice try moving the goalposts, since you explicitly said magic items in your original objection, which was comprehensively destroyed as an argument.
I read rules as written, not inventing hidden meanings.
Exlosive rune is directly stated to be considered a magic trap.
Magic traps, again stated directly, are not affected by area dispell.
Your Feeblemind, if anything, proves my point - it is explicitly mentioned because it's an exeption to the general rule - it should be affected by dispell, but it is not.
There are no mentioned exceptions for "magic trap - explosive rune".