Hi!

Is it OK to put large quantities of SPAM in a microwave?

Yes, just be sure to take it out at some point, otherwise it will begin
to smell like burning or turn rancid. I don't even want to imagine
rancid spam--the real stuff (junk mail) is bad enough.

Oh, and if you do--crank the power up to the "hotter than hell"
setting, so that the spammers can get a good taste of where they are
going.

William