There appear to be three flavors of portable now: truly, clean, and dirty.
- Truly-portable does not modify the host at all.
- Clean-portable modifies the host but restores it after running.
- Dirty-portable runs amuck, leaving changes, removing/adding files/registry, or :gasp: installing services!
I'd like to see all apps decalre their flavor, and of the latter two a severity rating or a chart of the planned changes or resultant damage. This way users can make an informed use decision... without having to set up a virtual machine to sleuth the flavor themselves.