Yeah, but it's understood a fair bit better than in that article now... I just need to write the new concepts down sometime.

No destruct blocks exist for pepper spray or electro-blaster because they were weapons added to the game after the destruct blocks were programmed. Destruct blocks set to weapon 8 can be destroyed by the Fireball Gun MCE, but there is no known way to replicate the Blade Gun in modern JJ2, so weapon 9 blocks will probably remain only vulnerable to TNT and the laser shield. Both pepper spray and electro-blaster can destroy speed blocks, though, possibly just because speed blocks weren't programmed to be resistant to the later-added weapons.