It is a good website, but similar to all such websites, it does not provide an english translation of Sunan Al-Majaah's hadeeths. If somebody can provide his texts in english, I will be really grateful.
I know Jinns are created from a smokeless flame of fire (which is simple to estabilish), and that they are invisible (as are most smokeless flames - low luminousity), but my question was specific to whether they are capable of taking human form.
There is some proof in Bukhari/Muslim Hadeeth that at least one Jinn (as most people say it was Iblis) is capable of taking a visible form (original form cannot be seen because it is.. invisible). However I do not know for sure whether the Jinn in the hadeeth was Iblis or any other Jinn.
I am sorry I could not answer the question...and unable to do so. Its a good question and I am curious as well.
I commented on those events supposedly by people seeing Jinns.
Good luck.:)