anonymous question

I will take advantage of your question to talk a bit about terms.

There is an offer. One subject says to another: let’s make an exchange, I give you A, you give me B. Refusing the offer without violating libertarian principles can become a reason for bargaining (how about B+C?), or for a shrug of the shoulders: well, it’s my business to offer, and your business to refuse.

There is a request. One subject says to another: give me A, if you don’t mind. Refusing to fulfill a request without violating libertarian principles can become a reason to move to an offer (what if I give you B, will you give me A?) or for a shrug of the shoulders: well, if not, then not.

And there is a demand, which is a request with a specified sanction for non-compliance. One subject says to another: give me A, or I will do B to you, and it won’t be pleasant. If no sanction is provided, it is not a demand, but a request. If a sanction is provided but not specified, it is a demand disguised as a request (I do not recommend such a practice, but these are my personal taste preferences).

In principle, one can distinguish another gradation where a demand is accompanied by a preliminary small sanction to prove the seriousness of intentions. Let’s call such a demand, for example, an ultimatum.

From the point of view of libertarian principles, making a demand or, even more so, an ultimatum, is permissible in relation to persons who have caused damage to the claimant. If the damage is material, it is permissible to specify material sanctions in the demand; if the damage is simply an inconvenience, then it is permissible in the demand to specify only the causing of inconvenience as sanctions.

And so we move to the answer to the question. Yes, a libertarian has the right to demand certain conveniences out of respect for age, but they can only threaten the causing of inconvenience for non-compliance.

— Young man, give up your seat for the grandmother!
The young man ignores the demand disguised as a request.
— How ill-mannered today’s youth has become! They jump on the bus and immediately run for a free seat. 
And then the grandmother stands over his soul and grumbles, causing inconvenience.

Likewise, a libertarian has the right to demand preferences out of respect for merits, but they can only threaten, for example, with the refusal of further cooperation, thanks to which these merits appeared.

— I have been working for you for five years without any complaints, and every time you put me on New Year’s duty without even asking for my opinion. I don’t care about double pay; I want New Year’s with my family and children. Either you show respect, or I will look for another employer who will show it.