Virtually every time you integrate anti-freeloading measures, everyone pays the price to catch a relatively small minority of people abusing the system. It does not at all follow without study that the suffering these measures cause are better than the alternative of allowing some level of growth in the abuse of the system to make everyone else's lives easier.

Every organization should do its own studies and reach conclusions based on what actually happens in its domain and location of operation. Anything else is likely harming people and more drum beating than solid work.