I'm a little disturbed by people so willing to let the resort off the hook. If the attitude is, "Oh well, it happens," then hotels and resorts have no incentive to stay vigilant against it.
I'm not saying the resort was negligant in this case. But if an infestation could happen in a matter of hours, that is all the more reason to do everything they can to stay vigilant. The owner base should encourage that.
If owners end up having to foot the bill, the owner base will put pressure on the resort/mgmnt company. That may ensure against the "Oh well, it happens" attitude if they are held accountable in that way.
On another note, I was surprised to learn heat kills them, considering hot climates are where most of the problem is. I had no idea it was such an simple fix.
It is not at all "letting the resort off the hook". The simple fact is no resort wants a bedbug problem. The owners DO end up footing the bill - they foot any expense that the resort incurs. Making them pay some trumped up and unwarranted compensation for what was an unavoidable incident doesn't teach them anything or make them more vigilant as short of banning any incoming luggage or other personal items they cannot stop it.
When there is a problem being ignored then it is proper to take steps to force action or make them pay excess as a lesson. If a problem is being addressed as best it can then piling on bogus penalties does nothing to help improve things but may unfairly enrich a few at the expense of many. There are too many things now days that people use in attempts to make money rather than actually handle a problem. There are certainly areas of guest services, comfort and safety that deserve to carry stiff monetary penalties if ignored. But situation like bedbugs that are way beyond the control of any hospitality operation (even the very best can suddenly find a unit unexpectedly infested after a single exposure from another guest) doesn't call for any punitive penalties unless it can somehow be proved that they knew of the issue and chose to ignore it. That isn't the case here.