Don't be pointlessly pedantic. Would you expect to be allowed to walk into an event and watch it for free if you weren't depriving anyone of something physical (a seat for example) and you claim you weren't going to pay for it anyway?
If you don't mind I'd like to dwell on this example for a moment or two.
First I'd like to suggest an amendment to the example. You are attempting to cast the individual in this example as one of an unattractive character by introducing the notion of expectation. I would not
expect to be allowed into an event at no cost, but if I was presented with the opportunity to do so, I probably would. People who commit copyright infringement do not
expect to be able to obtain copyrighted material at no cost, but if presented with the opportunity to do so, seize that opportunity.
The example is somewhat troublesome in that there are actual costs involved in providing the seat for the individual to make use of. In terms of utilities (electricity, heating, etc.), stewarding, cleaning, the provision of emergency services, etc. there are a range of costs that the event organiser would be incurring if they were to allow a person admission at no cost. This is obviously not compatible with the case of copyright infringement in which the rights holder incurs no actual cost for each infringement.
If we assume — to make the example more analogous to the case of copyright infringement — that there is no notion of expectation, and that the event organiser is incurring no costs by allowing an individual admission, I quite honestly do not see a problem with a person taking that opportunity and gaining admission at no cost.
No harm is done to anyone, financial or otherwise, but the individual derives enjoyment from gaining admission to the event. Is that not the most desirable outcome? Would you rather the seat remain empty and the individual deprived of the potential for enjoyment based on some stubborn notion that admission has to be paid for?