I use the SFS feature on my forum to help combat registration spam. However, I'd like to know if I could potentially disable username lookups? To me, the username function is not so good. If for example, someone chose the username 'Bob', they would likely be blocked as a spammer due to 'Bob' being reported as a spammer name countless times before. This causes issues and requires my approval. Is it possible for me to remove the username lookup feature at all?