You definitely should cite... What if they are wrong... You can always blame the citation...
Polywater is the perfect example of why you should citate. Just because someone publishes something does not mean its correct, scientific, or proven.
https://en.wikipedia.org/wiki/Polywater
http://science.sciencemag.org/content/167/3926/1715?sid=8b4e...
Science takes time.
Write a good paper and cite, cite, cite! If your citations are ever demonstrated to be incorrect or fraudulent other researchers can continue work to disprove the citations and work on correcting the errors.