Why not just ask for 260K? To lie in order to get it may seem like the only way to guarantee a realization of what you are worth, but this fosters a business climate that you ultimately may not want to live in. Companies may feel the need to be more defensive at the negotiating table, put the squeeze on developers in terms of hours or reduced open source contributions, or even to illegally collude in order to force people to stay at their... oh wait that one already happened.
A business climate in which parties are faking information can be a dangerous place. It is in our collective best interest to be honest and to foster an environment in which honesty is expected. Think on that the next time you buy a food product.
Another example that is more general: company leadership feels the need to produce a certain kind of quarterly financial result in order to appear favorable to investors or customers. The company that has the most accolades fakes it the most, leading to a lot of pressure on everyone else to do the same. Someone has to pay for this though, often it is paid in increased risk.
EDIT: removed irrelevant examples.