Oh FFS.....
Do we really have to bang our Amiga heads against the wall of stupidity every time we raise this totally anal subject.
Something isn't illegal until the "Judgment" says it is. Someone may express a legal opinion, fair comment but pass judgment on or threats to report anyone for any given activity as being "Illegal" is utter b*llocks!. The Police won't even turn up to give it case number. No arrests, No summons, No legal threats (Unless the case can generate cash!)
There is no spoon !
But........and this where "Reasonable" attempts is entirely subjective. I would consider someone trying to contact me as reasonable in reverse would be, "In writing" and if it was a legal matter (in this case I believe it would be), a solicitors letter/writ or legal statement of intent, marked/dated and stamped by a solicitor.
If I was wanting to "Reserve my Rights" I wouldn't just answer an email or answer the phone on such things.
My tuppence worth. !