On what on earth do you base these "Might be the same player as X"?
Names used: r4ul^, .hC.r4ul^, FunKy, .h4rDc0r3., ggg, newbY, newbie, fff, noname, .hC.LaG, JeFF, KniFe, ahgagga
Reverse DNS: dsl-hpo-fe92de00-93.dhcp.inet.fi
Name used: rushtale
IP: 126.96.36.199 resolves to "dsl-olugw6-fe7bdc00-86.dhcp.inet.fi"
More specifically: dsl-*.dhcp.inet.fi
It's not uncommon for players to be able to obtain different IP's but have the same host mask.