[malandrew]

It's totally within the terms of service as far as I can see, since it is on topic.

Exercising your warranty rights is a perfectly valid solution to a technical problem.

It's always been common to suggest to people that they try restarting their devices to fix a problem or going as far as reinstalling the software in question. When neither of those work, replacing the device if it is non-functional is the next step and exercising your warranty rights is a legit way to implement that technical fix.