You are the only "scientist" in the whole universe who is aware of this terrifying idea. Please publish your evidence in a peer-reviewed journal immediately.
Don’t worry Cofty. It has been done. An animal that has a harmful near-neutral mutation will not die out because the mutation is not big enough to be ‘noticeable.’ The animal lives on to reproduce — with its offspring also acquiring that mutation (if it affected the reproductive cells). But now, those offspring not only have the mutation it got from its parents, but 100-300 entirely new near-neutral mutations.1 By stark contrast, the famous geneticist, H.J. Muller, said a rate of only 0.5 mutations per person per generation would doom the human race!2
1. Kondrashov, A.S., “Direct Estimate of Human Per Nucleotide Mutation Rates at 20 Loci Causing Mendelian Diseases,” Human Mutation 21:12-27, 2002; Nachman, M.W., Crowell, S.L., “Estimation of the Mutation Rate Per Nucleotide in Humans,” Genetics156:297-304, 2000; Sanford, John C., Genetic Entropy and the Mystery of the Genome (New York: FMS Publications, 2005), third edition, p. 21.
2. Muller. H.J., “Our Load of Mutations,” American Journal of Human Genetics 2: 111-176.