According to a TripAdvisor survey,
Eighty percent of travelers said they are concerned about bed bugs when visiting a hotel. Eight percent of travelers surveyed said they have experienced bed bugs at a hotel.
I suspect Tripadvisor.com regulars would be among the more informed travelers, hence the greater awareness of and concern about bed bugs.
It may seem improbable that 8% claimed to have encountered bed bugs in a hotel.
However, one study showed 0.6% of hotel rooms were infested in a three-year period.
It would not take many trips or hotel stays for 8% of a group of fairly-frequent travelers to encounter bed bugs at least once.
The first key to avoiding them in the room (and ultimately, to avoid taking them home): learn to search your hotel room for bed bugs. This FAQ provides more tips.