AVR-Chat

I have an application where I need to use an ATmega8 port pin to apply 
bias current to a PIN diode RF switch.  10ma is all that's needed, which 
is no problem.  However, the side of the RF switch that is being 
supplied current is connected to a mobile vehicle receiving antenna.  My 
concern is that static build up on the antenna whip during motion will 
pose an ESD risk to the ATmega8.

In practice, the antenna will have a DC resistance to ground of only a 
few hundred ohms, so I'm certain this will be enough to drain off any 
long-term accumulation, but is this sufficient?

I know the pins have ESD protection diodes.  I've never given them much 
thought before so I don't know if how effective they are at dealing with 
this sort of environment.

I'm probably being overly careful.  I suppose I could put a buffer 
between the I/O pin and the RF switch bias input, so the (cheap) buffer 
would get toasted before the (more expensive to repair) ATmega8.  But is 
this even worth worrying about?

-Johnathan