Peter Sturrock, a scientist who actually looked into this subject gave some advice to other physicists potentially delving into it, points one and two are especially relevant:
Either stay away completely or do your homework first. This is a very complex subject, and "doing your homework" will not be quick, easy or painless.
Do not imagine that training in physics provides you with any relevant credentials that enable you to pontificate on the problem. Expertise in forensic science would be another matter.
Read the Condon report from cover to cover preferably from back to front so that you can better judge the extent to which Condon's conclusions and recommendations follow from the work of his staff. (E.U. Condon, D.S. Gillmor, Scientific Study of UFOs, Bantam Books, 1969)
Learn something about the history of the subject. An excellent summary of the early days of the controversy can be found in The UFO Controversy in America by D.M. Jacobs (Indiana University Press, 1975).
You might also wish to learn what a nongovernmental scientific review panel had to say about the subject by perusing my own book, The UFO Enigma: A New Review of the Physical Evidence (Warner Books, 1999).
Finally, bear in mind that although most scientists treat this subject as a joke, the public does not, and we would do well to treat their concerns with respect."
"Most scientists have never had the occasion to confront evidence concerning the UFO phenomenon. To a scientist, the main source of hard information (other than his own experiments' observations) is provided by the scientific journals. With rare exceptions, scientific journals do not publish reports of UFO observations. The decision not to publish is made by the editor acting on the advice of reviewers. This process is self-reinforcing: the apparent lack of data confirms the view that there is nothing to the UFO phenomenon, and this view (prejudice) works against the presentation of relevant data." Peter A. Sturrock, "An Analysis of the Condon Report on the Colorado UFO Project," Journal of Scientific Exploration, Vol.1, No.1, 1987
"The definitive resolution of the UFO enigma will not come about unless and until the problem is subjected to open and extensive scientific study by the normal procedures of established science. In their public statements (but not necessarily in their private statements), scientists express a generally negative attitude towards the UFO problem, and it is interesting to try to understand this attitude. Most scientists have never had the occasion to confront evidence concerning the UFO phenomenon.” Dr. Peter A. Sturrock, Professor of Space Science and Astrophysics and Deputy Director of the Center for Space Sciences and Astrophysics at Stanford University (Survey of American Astronomical Society)
