General aviation pilot voiced concern regarding D10 Controller's unwillingness to provide RADAR service into ADS; reporter alleging lack of service is unsafe.

Narrative

I departed Denton (DTO) to return to ADS under VFR rules. I listened to ADS ATIS for the appropriate Regional Approach Control frequency. According to the ADS ATIS; Approach Control was to be contacted to obtain clearance for landing at ADS. So far; everything is as it should be. The Regional Approach frequency was very quiet; so I was surprised when I encountered the 'stand by' message. I decided to circle outside of Class B (about 20 miles north of ADS) while waiting to get my VFR clearance to ADS. This is a busy airspace and I did not like circling and waiting for the call back. While waiting; I heard at least 3 other planes contact Approach Control for clearance for a landing at ADS and they were all told to wait. However; the frequency remained quiet. Finally; Approach Control broadcast that all VFR traffic were to not call him. Finally; one plane asked what to do and was told to 'Try the Tower.' I was listening to the Tower frequency and heard him get a clearance to head straight to the airport. I quickly abandoned the Approach Control frequency; tuned the Tower who provided me a squawk code; and I landed within a few minutes. This was the first time that I've encountered this issue with DFW Regional Approach. If DFW Regional Approach is to manage traffic flow into a busy airport like Addison; then they need to staff the position appropriately and provide the needed services. Broadcasting to VFR traffic not to call for this service is inappropriate; frustrating and simply unsafe.