The real question is- are they flying the procedure VFR for the sake of familiarity with the procedures, or are they flying the the procedures to log the approaches for currency? The first instance is no problem and is actually a wise idea for folks who do not have the tools available to fly hooded down to minimums. The latter is not legal and can get you in trouble.
Your logbook is your logbook. If you put 1000 approaches in there, but do not use them for currency or certificate actions, they mean nothing but a measure of experience. Anything, any time, any landings, any instrument approache that you use to show currency or to gain a certificate must be flown iaw published requirements.
Being totally familiar with the approaches at your home airfield and the approaches along your routes is a very smart thing. Flying these approaches VFR will only serve to make you familiar with these procedures. I can find no problem with a pilot flying them VFR. He should know that it is his responsibility to maintain traffic clearance while in VFR conditions, hooded or not! Never depend on ATC for your traffic clearance while in VMC either.