I think it really depends on your market, and how you set up the thermostats. With my house in Florida, we absolutely have thermostats that we can lock out (remotely) or set limits on, because you can easily freeze up a unit by setting the AC temperature too low. I also don't want tenants to turn the air up so high that it doesn't come on at all, not good for a hot, humid climate. So we have the AC limits set at 72 at the bottom and 79 at the top. If you have a crappy system that doesn't run well, or the registers in the house aren't balanced well, that might be an issue. In our house, 72 will freeze you solid downstairs and most of our guests end up raising the thermostat to 74-75 (which is what we tell our guests and recommend). In the winter, we set the heat upper limit to 79 as well though this is rarely an issue. 

I wouldn't use programmable ones that can lock out that can't be controlled remotely, because I can override anything if the situation calls for it. We advertise our temperature limits for clarity and have never had a complaint. We also advertise the heated temperature of the pool to avoid complaints, because some people think a heated pool will be like a hot tub. 

Most important is clarity up front, before anyone books, and setting the stage so that everyone knows the situation and expectations. And staying in your unit yourself, in the hottest and coldest months, at least once or twice to see what the effect is of the thermostat settings.