Not Cool ...
Regardless of CC, turning up at the gate to a delayed flight carrying any sort of drink prepared by a barista is not cool.
It's unprofessional and disrespectful to our paying passengers.
If you are walking through the terminal to your flight that has been delayed, at least attempt look like you care about the pax.
If you need to delay your arrival at the A/C to comply with CC recommendations, do so before immigration where nobody knows what flight you are operating.