once you harvest the switch it is best to use just the clear stems instead of the whole switch..
The housing doesn't stand up to soldering
the internals may warp
I've not had that happen yet... Housing stands up to soldering just fine. Why would the internals magically warp? You only heat the pin ends for a fairly short time. Disassembling switches has a higher probability of warping the metal inside the bottom housing, but that's about it.
TP's probably just trolling 
I think he actually believes some of the stuff he says 
I stand firmly on all stuff said by I, TP4.
I am open to corrections.
I have had the switches wharp due to heat, "before" I got a soldering pump.
It's not that easy to get the switch off if you only have a thin tip on hand.