I'm pretty sure what MixedNuts is referring to is the phenomenon of nursing home residents being raped by staff/family, not nursing home residents raping people - I don't actually know how common the former actually is, but when I worked in a nursing home we were specifically trained to be on the lookout for it and told that it is indeed a thing that happens, mostly (according to the training) because the victims are, as MixedNuts mentioned, easy targets - they have limited access to people who they can report abuse to and are often written off as confused, among other issues. (Also, I never saw any instances of catcalling in the four years I worked in a home, and I mostly wouldn't expect to given the dynamic of seeing the same people all the time - main exception would be someone who got hit particularly hard by the disinhibition effect that dementia sometimes has, in which case catcalling from that person would be the least of your worries and they probably wouldn't be kept with the general population of residents. (My home sent such people to a facility that specialized in such things, which on one hand sucked but on the other let us keep our non-dangerous dementia patients integrated with the facility, which was pretty awesome for them.))