Depends. Delete - yes, if it's not the accepted answer or locked. But deleting highly-upvoted answers is generally discouraged. Edit - Probably not. Editing t

Depends. Delete - yes, if it's not the accepted answer or locked. But deleting highly-upvoted answers is generally discouraged. Edit - Probably not. Editing to correct it might be possible if it's not locked but editing to add such a disclaimer would be problematic. The best course of action would be to request disassociation, so that it's not attributed to them any more.