Sadly enough I've talked to quite a number of people who believe all the lies these movies feed them and still believe it after I tell them it's not true. These kinds of people are going to find a way to be afraid no matter what. Americans are fed fear everyday of there lives and it's up to them to go out and find the information for themselves, sadly most of them don't. Media owns people controlled by fear, like they're bloody zombies. Some will never get over fears because they've been scared there whole lives and are too afraid to change.
So go and try to enjoy this slap stick movie and have a good laugh. The stupid people around you are just going to find another way to be afraid even if there wasn't movies like 'Anaconda'.
In the words of a Ball python, "I won't eat it, but I'll squeeze it."