General aviation pilot descending VFR for FRG was notified by FRG tower that the aircraft data block indicated a possible Class B entry; reporter alleging no violation occurred and indicated N90 has recently refused Class B services.

Narrative

I was on a descent from a VFR flight inbound to FRG from the northwest. I circumnavigated the Class B airspace to the north and descended from 7500 FT. I descended to below 3000 FT MSL before crossing under the Class B airspace. I called FRG tower at 15NM out and was given a left base entry to Runway 1. When I was approximately 7 miles out the tower said that my target on radar had a letter 'L' next to it and was not sure what that was for. I am not sure if since I was just outside of the edge of the 'B' airspace that maybe TRACON thought that I was in it. I used an IFR approved WAAS GPS with a current database and was outside of the airspace at all times. Aside from not being sure as to why I was labeled on the D bright; I am writing this for another purpose as well. I have been flying in and out of Long Island for 30 years now. I have quite a bit of experience with TRACON and the ATC system. There is an issue that exists now that I have never seen before. For all of my years until recently; unless it was a very busy IFR night; it was always possible to talk to TRACON when crossing over NY's airspace and almost always a Class 'B' clearance was given to descend through it. This is logical since once entering Class 'B' airspace; TRACON has full control over the VFR traffic as well as all of the JFK; LGA; and EWR inbound traffic. My last 14 attempts; over the past 6 months to obtain advisories and/or clearance were immediately answered with a response 'Stay clear of Class Bravo airspace; unable advisories'. I no longer call to ask since it is no longer an option. I hear talk at the airport from many other pilots claiming the same issue. I am not sure what has changed; however I can assure all that a very unsafe condition exists when multiple VFR targets are flying east bound at 7500 FT out of ATC's control; and commercial inbound traffic to NY's airports would need to divert around these targets.