No it wasn't.
I think if I had a sign up saying no soliciting I'd get much stranger looks.
If you say so. On the same note maybe the postman would have delivered your package.
And yes I typoed as I meant to say few instead of new, apologies.

Europe
In England and Wales, the term soliciting refers to: "for a common prostitute to loiter or solicit in a street or public place for the purpose of prostitution", under the Street Offences Act 1959.[1] The crime of soliciting should not be confused with the profession of a solicitor, which under UK law is typically that of a lawyer, who may also function as a legal agent to obtain the services of a barrister on behalf of a client.
The description of Kerb crawler makes clear that also: 'the addressing or accosting by a potential prostitution customer of a supposed prostitute with the purpose to conclude to a prostitution agreement with her' is entitled 'solicitation' by some.
A term quite commonly used with respect to prostitutionLike you said cold calling is typically conducted over the phone so maybe it's best to use the commonly used term i.e soliciting.

Nope but soliciting is the word generally used in this area!
Oh, just stick a big image of pedobear on the sign with the quote “free sweets, inquire within“.
Now, THAT will get you some funny looks..... maybe a few bricks and broken windows too mind.
You should have an instructional graphic based sign instead.
A simple stickman with a RM bag posting a letter in a box with a tick.
Annoying rabble with pitchforks, circulars and questionnaires with a big cross.
I'm sure someone on here would knock you up an inventive sign if you're up for it!