Not matter how hard the likes of TripAdvisor try to weed out the dodgy reviews, a darker side of human nature can sometimes play a part.
A survey of over 2,500 travellers has seen one in eight saying they have bribed a travel brand with a bad review in order to get what they want.
UK-based online travel agency Sunshine.co.uk asked travellers what they may have done in order to get what they want or benefit in some way during a trip - and got some pretty downbeat responses.
Some 13% said they bribed a brand, but almost a quarter (23%) said they had lied or exaggerated a bad experience.
In addition, one in ten said they had refused to pay a bill and 8% had lied about a special occasion such as a birthday, honeymoon or anniversary.
Diving deeper into the litany of naughty behaviour, the survey found that restaurant staff were most common recipients (65%), following by hotel reception staff (21%) and members of the housekeeping team (18%).
Of those that had admitted bribing a travel service with a bad review, 47% said they did it to save money or get a discount, whilst 38% were looking for an upgrade of some kind.
Just over half (51%) claimed to have been successful with their endeavours.
Sunshine.co.uk managing direector Chris Clarkson says:
"Threatening bad reviews is clearly one of the top tools in Britons' bargaining arsenal.
"Hotels and restaurant rely a lot on good reviews only to drive custom and bookings, so it's easy to see why threatening a bad review would make them bend over backwards to accommodate a customer's request."
NB:Bad review hotel image via BigStock.