Looks like your marina has some serious stray current going on. Presumably there are rules and posted signs prohibiting swimming around the boats?
Divers doing cleaning and repair will likely be temporarily unplugging yours and the boat on either side from shore power while they are working. If you have a diver working (paid or unpaid) you need to get his/her understanding of the potential risk they face diving in fresh water with a local history of current leakage.
(Your bio indicates that you are mooring in fresh water, so my response is based on our experience here in fresh water.)
When you have documented anode wastage, there is a problem. Period. And potentially some risk to swimmers.
Here is an article concerning this.
Electric Shock Drowning (ESD) Explained - Seaworthy Magazine - BoatUS
Kevin has visited our YC and does explanatory presentations around the NW about this danger.
So, there are two parts to the "problem" -- loss of your underwater metal parts on your boat, and, direct risk to anyone in the water around your boat.
Given the national attention this issue has received in the marina industry in the last few years, any marina that ignores current leakage into their waters is approaching a storm of liability, as well.
Our YC marina has spent significant $ on bringing our whole wiring system up to code and just finished changing out all the 30 amp outlets to GFCI breakers. Not cheap, but Due Diligence requires attention.
Not to change the subject slightly, but the changeover to the sensitive new breakers also revealed several boats with bad interior AC wiring or corroded appliances that needed to be repaired and made safe! Bit of an "eye opener" for several of our members, it was.
All the best, and stay safe.
(Pt Capt at a 150 slip marina)