While I agree with resistant bacteria being a problem I don't think that's much of an issue in this case. The constant use of things like hand sanitizer is a major problem but I doubt this is much of one.
If you actually think about it there are very few "super bugs" out there and we have been globally abusing disinfectants and biocides since we discovered them. It's taken years and exposure of many times more bacteria than any of us can fathom to create these bugs. So the odds that this one person improperly cleaning a small colony of bacteria in their tank is going to inadvertently breed a super bug is astronomical.
Just because you read a scary EPA or CDC study doesn't mean you need to try to scare people cleaning their BPs tank. Why not put up signs near hand sanitizer dispensers, hand out pamphlets outside your doctor's office or visit farms in the area and ask them to stop dumping antibiotics into the cattle's water supply? You know something really useful.
Should OP be properly cleaning his tank? Yes. Is he going to breed a super bug by not doing it correctly? It's inconceivably unlikely.
Oh and since you're asking for data about bleach, I assume you will have no problem producing something showing that such a small colony of bacteria poses a threat when not properly exposed to bleach. I'll wait.