After considering this for a while (Note, I play one of the elderly in question) I believe that robbing the elderly at labs is one of the most realistic things to do as a crim.
If I was a lowlife piece of scum with the intent of robbing people anyway, I'd absolutely salivate at the opportunity to get free real estate with the elderly. In fact, I think this behaviour doesn't warrant a rule change, but instead a roleplay response from us as "the elderly group". We are old, being abused left right and center by the gangs in the city, so maybe the correct roleplay response is to simply not go to places where such conflict is likely.
Something, something, be the change you want to see in the world; I'm in agreement with alex ultimately. If we want to see an uptick in roleplay standards towards us, we (the elderly) just have to make our roleplay as realistic as we want to receive.
As an aside, I personally think that opening up all labs at once is not terrible, but with a small tweak. Maybe instead, allow a maximum amount of labs to be active, and have them be able to be destroyed by fellow gangs (or even PD if informed by crims) and set up elsewhere at designated spots. Creates a more dynamic environment, incentive to roleplay conflict (which people love) and a more realistic turf system. Idk how hard something like that would be to implement, but it does create RP OPS imo.
Note: I'm hella dumb so if anything about the suggestion above is based on incorrect information, sorry guys .