This entire thread is really taking me back to my own pregnancy days. The way people talk to pregnant women!
If you don't do (whatever) you're irresponsible. You don't care about the welfare of your child. You don't appreciate what a gift it is to even be pregnant. Why would you even CONSIDER this, you terrible person? You'll never forgive yourself if anything happens regardless of your actual culpability. Of course the flip side of that last statement is that if DO forgive yourself, you're probably some kind of inhuman monster.
You also get talked down to like a child. "The parks will still be there." Uh yeah, I really wasn't expecting them to be destroyed in a combo earthquake/tsunami/volcano next week.
"Just do what your doctor says and don't ask questions." Because all doctors are exactly the same and no other doctor has ever made a different call with regards to this situation. (For the record, mine told me I could do whatever I wanted, just pay attention to my personal comfort level.)
It's one thing to give personal anecdotes, and describe your feeling on the issue. It's also awesome to share scientific studies and links and what-not. But when it comes to pregnant women, for some reason, everyone seems to think that they're foolish children incapable of making up their minds about anything. And it's our duty to shame them into behaving "properly", however we personally define that.
Phew! Okay, now that I've got that off my chest.... OP, once you've done your research, please then go ahead and do whatever you want, without shame or guilt. It's your pregnancy, no one else's.
And it's good practice for the future, when everyone will be trying to tell you how you should be raising your child.