What is lightwork? - well, in the first instance I suggest you run a search on google or some such and see where it takes you. To begin with you could try here for what it means for one person http://groups.msn.com/Lightworkers/pagansandwiccans.msnw.
In passing, might I suggest that it is somehwat imprudent to dismiss a warning as paranoia when, by your own admission, you know nothing of the subject?