It is true that bedbugs have been increasing in number.
I am in the pest field and it isn't just travellers that are causing the increase. Part of the problem is the switch in treatments for hotel rooms for insects. In the last 5-10 years there has been a shift in the pesticides used. There is a lot more baiting done now, which can kill cockroaches and ants, but not bedbugs.
Over the course of my career in the field, bedbugs are the only things that have given me the "heebie-geebies".
You haven't lived until you see a bedbug infested room (bed, walls, curtains, lampshades, basically anywhere there was a crack or crevice you could find bedbugs)
Sleep Tight