It is stupid not to put lights on a tower even if you can, just to save money. Unfortunately there are those who will do just that. There are enough 'weekend warriors' flying around or pilots who are below the minimum flight altitude for legitimate reasons. Either way having something sticking up where someone may not see it or see it when its too late to do something is just stupid. I know tower lighting is not cheap but an accident that wrecks the tower, and injures or kills someone is way more expensive than the cost saved.
Another tower related issue. have the lighting reasonable. There are some cell towers with the strobes set so bright they light up everything. You only need the strobes to be bright enough to be seen at a reasonable distance (1 mile for cellular is fine). No lighting is bad but too much is a nuisance.