The title may seem a bit weird, let me explain.

While going through some questions, I found a spammer network about 5 users with each of the users posting answers on others' questions.

Besides these users, some of the community users had also posted their answers.

Now, I proceeded with destroying the spam users. While the questions and answers of spam users were gone, curiously, the answers of community users still remain, even through the question was deleted.

To cite an example: The question remove kaspersky internet security 2011, I mean I need a clean way (10k+ only) had answers from 3 spam users + 2 by community users. I destroyed the spam user accounts, while the question was deleted, the answer by Daniel & Paul remain.