I don't know what happened at Rendelsham, and I'm quite aware of the possibility for lying, embellishing, and just plain mis-remembering after the fact by the witnesses.
I just don't see a huge airbase being sent into a tizzy by the same lighthouse they'd lived with for years ON A CLEAR NIGHT.
Yeah, true, doesn't make much sense.
My personal wish is that aliens are not here, as my incination is to be scared of them. Not to mention what public knowledge of such a thing could do to the stock market :-D
But seriesly, they could be around. I am not confident that what we consider to be the laws of physics are the final word on the subject.