The current crop of radars only has an output in the order of 125 watts max. That would be for the Collins 700 series or Honeywell RDR4.
Some of the older ones put out considerably more and did in fact represent a danger if you put yourself in the beam.
The DC9's had an antenna that rotated 360 degrees but the radar wasn't transmitting when the antenna was less than 90 degrees ofset to the fuselage and there is radar absorbing matting on the bulkhead.
Danger to the pilot? Virtually nonexistant. To the technician? There have been incidents.