hmm, i dont think so, what will happen if there is more then 2 results, witch one will select for execute? thats just protection from something... if find 2+ results what should not happen
But for example there are two players "Dusan01" and "Trucksan22" if one player writes /u san will found 2 matches and will return invalid id, this only happens if write a part of name but if write complete it's ok.