This ties into the "let's make money thread."
Suppose I charge $$$ to go into a house.
In front of the owners I do some voodoo stuff, then tell the owners to leave.
Over the next couple of days, I install water hammer arresters, redo faulty wiring, spray a crapload of "great stuff" into all the walls/floors. I drill about 1000 self tapping screws into everything to tie all the walls/floors/ joist together. Then I spackle everything over. Maybe even true up some loose doors and stuff.
For effect, I stick some dry ice in a box and walk out like this....
Would I be statistically any less effective than any 'real' exorcist?
Makes me curious.
