Alot of it is scaremongering. I just don't think we are all heavily infested like they would have us believe. And why doesn't one course of herbs get rid, some people are taking stuff almost continuously. I'm not saying we don't get parasites or worms but i think if you're eating right, most just get discarded naturally, and if not the fasting does the rest.
I did a colon and parasite cleanse begining of the year. I only did the parasite bit because it came in the kit. That rope thing that comes out, sorry but that is just the stuff you ingest taking on the shape of your colon.