Most types of worms (pinworms,hookworms,etc.)are most likely acquired by exposure to fecally contaminated food and water.In the wild this isn't a problem because they roam long distances.In captivity they may re-infest themselves by drinking the dirty water or feces.Roundworms have an indirect life cycle and need an intermediate host.They are acquired by ingesting the host such as frogs,fish,rodents,lizards.Tapeworms also can be acquired by ingesting an infected invertebrate or mammal host.Only a problem in captivity because of the chance of reinfecting the reptile and building up rapidly.Secondary malnutrition and inflammation can be caused in large numbers of tapeworms.I'm done with the topic myself
Everyone will do(or believe) what they want to.I don't have any problems with my monitors(except spending enough quality time with them) 

