I've always believed that entirely too much emphasis is put on the latency mode. The vast majority of players out there don't even understand what it actually does, and even more that do don't have a sufficient grasp of how packets cross a network to interpret the ramifications of what it is.
Switching to LAN latency will technically improve micro effectiveness, but by an margin so small that I would judge it to be potentially noticeable, but completely irrelevant to all but professional players.
In any case, I don't think you should be allowed to require the tools. If you wish to use and recommend them, I have no issues with that.
[edit] Looks like I missed an important point: If you set the latency mode too "fast," and the network's actual latency is too "slow" for that setting (which I would argue is the case more often than not for internet-based lan-latency games), then you suffer far more than if you set the latency mode to its "slowest" setting, even though it doesn't "feel" that way in-game.