Yes, I think I would be feeling quite upset at having received such a "gift" too. FWIW I'm not sure that that bedbugs are 100% preventable from housework & many people don't react to the bites so they might not have realised, kwim?

Have you seen any of the little suckers? How do you know it's bedbugs for sure? Without a sighting, is there a chance that it might still be another kind of critters (like fleas)? How would you know?