I make charitable donations all the time:
- Breast Cancer Research
- Autism & Asperger's Educational School
- Feed the Needy
Heck, I even give a few bucks to the homeless people I see around town.
Oh, you meant "when was the last time I donated to the WTBTS"!
I quit when I began suspecting it was a cult, which was around 2002 or 2003.