Where I live in the UK it is a common statement that looking around on comparison websites such as GoCompare or holiday websites such as BritishAirways will result in them using various methods to identify you are looking and raise the price when you next check.

So the question is, do Airlines (and similar price comparison websites) "Up the prices" on repeat visits, or is this a local myth?

Though not part of the question, any additional information on how they do this and how to prevent it would also be appreciated if it turns out to be true.

Note: I am not after the use of just cookies as such is provided in this question: Does RyanAir Use Cookies? Instead I am after if they use any variety of methods and is open to a wide market of not just airlines.