The Internet allows you to talk to a greater number of people about 'the Bible' than if it was only your local Congregation you were talking with. Even then, the most critical would probably be from your own family, if they were not already believers in the same doctrine as you believed in.
When Paul was talking about 'knocking the dust off his boots' he was 'finished with that town'. What happened to them at judgment time was now in their own hands as they had a copy of the Bible. The end would be 'harsh' if the heads of the families made sure the Bible stayed closed. If the faith of a Christian parent covered the whole family (children until 20 years old) it would also be their 'mission' to make sure they knew what to teach their children about God.
Re:2:20-23:
Notwithstanding I have a few things against thee,
because thou sufferest that woman Jezebel,
which calleth herself a prophetess,
to teach and to seduce my servants to commit fornication,
and to eat things sacrificed unto idols.
And I gave her space to repent of her fornication;
and she repented not.
Behold,
I will cast her into a bed,
and them that commit adultery with her into great tribulation,
except they repent of their deeds.
And I will kill her children with death;
and all the churches shall know that I am he which searcheth the reins and hearts:
and I will give unto every one of you according to your works.