Summon spell destroying the campaign world?

Some of the "Special Forms" that start on p 148 of the Grindhouse version could wreck a campaign world, depending on how far you take them.  If someone casts Summon in a major metropolitan area, any of these effects could decimate a neighborhood if not the whole city (as could a more conventional monster, actually).

#3 causes a local breakdown in logic, but it could well become global.  #4 might end all conflicts in the campaign area, leading to a story-ending peace or genocide at the hands of species not affected.  #5 causes irrational jealous rages and the birth of monsters.  In #6 an otherworldly entity bent on world domination possesses someone present; the entity suppresses all vestiges of will in other beings, even instincts of self-preservation and self-defense.

I'm sure the others have dire consequences that I haven't thought of yet.