In my case I think it was a really bad idea, not that I knew there was a "safe" choice at that time. I actually thought I was doing myself a favor by drilling them out. Big mistake! I have been suffering ever since I've drilled two of them out, and it's now been almost a year.

Of course, not everyone reacts the same and has the same predesposition towards certain toxins, and I know plenty of people who have had their fillings drilled out and nothing happend (at least symptom-wise)

The choice is yours, but in my opinion it's a gamble and if I could re-do it, of course I would choose against it.