Welcome to the joys of having a strip!
I found that some forceful discussions with the relevant owners / clubs fixed the issue. If you're non-radio then Safetycom is pretty much useless. Locally we have Safetycom - barely used (and less than memorable!), the microlight frequency and at least 2 glider frequencies plus of course that good old fallback of 123.45 with of course the local Class D who still like to 'control' 30 miles out! So the chances of a 'non-radio' aircraft being on the right frequency is pretty slim.
The answer is to communicate with the owners / clubs. As for 'shopping them' to the CAA - if you don't want to continue living in the area it may be a good strategy - unless you want to be public enemy No1 in your chosen hobby! Stop ranting and talk to them - once they understand the problem it will go away.