Yeah anytime I go to Maccas, KFC or subway, (subway I get them to microwave and toast) I still bring it home and nuke it for a minute or 2 till really hot.
I do this too!!
I occasionally eat the burgers with lettuce in them.... I do end up pulling most of it out though, it goes limp and yuck after being in the microwave.

Still don't trust the soft serve machines though...!