Plus, this data is publically available, on digital format. Anyone who wanted a copy of the data has much easier ways to take it other than copying the outdated version in FT's paper by hand.
Fake symbol and numbers are easy to spot, as they will be crossed with other sources. They are also somewhat risky, as posting literal fake news mixed with real is dangerous.
Doing this is a benign way to see if anyone is sourcing data from you.
