[UK-CONTEST] OT - RFI problem

[G4FNL]

Folks

Forgive the off topic nature - but I reckon that someone on this reflector
will be able to help.

I need to explain RFI problems that I am experiencing on a site nearby me to
a non-radio type person. The problem is solvable I am sure (it's RF
breakthrough into an intruder alarm.) However, as I say, this is not at my
QTH - it's elsewhere, and I don't really know the people involved yet as
this appears to be an intermittent type of problem. So, what I am trying to
do is have an analogy ready, to explain that whilst the problem is only
present when I am around, it's not actually my fault, and that the company
that fitted the alarm should be called in to investigate. Has anyone found
an analogy or example that explains RFI problem and whose 'fault' it is?

Any help much appreciated

73 Graham G4FNL