Now that the AMA has concluded we can get back to our usual serious business
https://startrek.website/post/35829159
Given that keeping him around was murdering both Tuvok and Neelix, killing Tuvix was technically -1 murders.
Why not just riker-clone tuvix then unmerge them then shoot tuvix out the air lock?
Riker clones can only be made on that one planet with the reflective atmosphere