Suppose someone offered you a free TV to sit through a 2 hour presentation about a timeshare. Does that entitle you to just take the TV and leave without sitting through the presentation?
You chose a particularly interesting example: as far as I can tell, to a first approximation, all timeshares are scams designed to separate a fool from their money.
So if I had the free time, I would consider attending in order to ask pointed questions and warn other people away.
You could also make the argument that ads or ad networks are potentially dangerous. That doesn't make Ad Blocking ethical, just justified. The ethical thing to do would be to either not use an Ad Blocker or not visit sites that are ad supported, neither of which is realistic if I'm being honest.
I think we're at a very Napster moment for content websites.
That's a choice for the individual to make but lets stop pretending that Ad Blocking is ethical. It's about as ethical as Napster was, but given the alternatives it's the obvious choice.
Additionally you can use things like Patreon or Google Contributor.
