Lets get real, we are talking about a piddling little battery operated transmitter that would take a three years and four months to heat a cup of coffee!
If the output transister used cost more than a packet of matches to make, then it should handle an open circuit load.
If you un-hooked it from the 8 valve output stage, 10 kilowatt, radio transmitter that I used to repair back around the end of the 70's, then you could expect to see a few sparks.......
Hope this helps, Peter