A proper engineer would make the tag absorbent and use the principle of capillarity to transfer the water to the bag (and the other way round once tea flavoured) to cover this case.
Users can't avoid being stupid, but a proper engineer should be able to cover all cases.
And also the existence of a perfectly insulative, yet durable and long-lasting sheath for the bag and string. I realise it's just an analogy, and in cyberspace that sort of thing is trivial, but with real matter it's beyond a pipe dream.
No, that complicates things way too much. Simplicity in design is beauty. A real engineer would recognize the tag on the string not only as a point a confusion, but also a superfluous feature. Simply remove it. The end user will have to use a spoon supplied by themselves to remove the teabag, but thats their problem. At least there is actually tea in the cup at that point.
So you're saying it should wick the water from the cup to the table like an oil lantern. That seems like a good way to have half of your cup on the table.😂
If you get it to travel up the string, gravity will definitely do the rest. It seems like such a passive aggressive way to design a product and I'm all for it.