Then will you be volunteering your time and resources? Remember: once you start volunteering, you cannot stop, because you will "break everyone's trust and expectations" or even be "malicious". Happy volunteering.
Of course the entitlement to volunteer work is also rude, and in my opinion worse.
I don't think this is a reason to never volunteer but you have to develop a thick skin, know where your lines are, and at some point politely but firmly say "no."