The question is too general. If you find yourself in front of a microwave antenna dish, yes, you should be very much concerned about RF radiation X-D and there's not much doubt about that.
The cell-phones-cause-brain-cancer scare was successfully debunked, wasn't it?
If the effect of RF doesn't go beyond thermal, then you probably shouldn't be concerned about sitting next to an antenna dish any more than about sitting next to light bulb of the equal power. At the same time, even if the effect is purely thermal, it may be different from the light bulb since RF penetrates deeper in tissues, and the organism may or may not react differently to the heat that comes from inside rather than from outside. Or it may not matter - I don't know.
And apparently, there is a noticeable body of research, in which I can poke some holes,...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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