Re: How much to review your spam call messages?
The answer to this (BT) scam is simple.
A memorable 3 digit number to dial after a spam call.
If that number is reported more that, say, 10 times in an 1/2 hour, 15 times in 1 hour, 25 times in a day ... BT HAVE to block it, investigate, inform OFCON, OFCON HAVE to prosecute, etc.
If the number's from abroad, Johnny Furriner has to do the same to OFCON's satisfaction, or the whole nation goes onto manual intercept with no exceptions until they do.
Decent minimum penalties - is public hanging, drawing and quartering too lenient? - discuss.
A _N_ D - just to make it fair - every certified spam call attracts a £20 compensation payment from the telco, which they are obliged as part of their obligations to recover with costs from the spamming company and / or its directors.