Possibly, yes, if you find the 'real' client leaving function. The only problem might be when you ban/kick someone - teleports might not be deleted if the client crashes/leaves instantly, it depends on whether the Torque engine uses that function when it detects someone has 'crashed'.
The 'it' I was referring to, forgot to say, was Blockland0002 or RTB - they have the FPS folder and a bunch of useful generic Torque scripts in .cs's you can get function names out of.